Can a malicious add-on access internet history and such in Chrome/Firefox? Announcing the...

macOS: Name for app shortcut screen found by pinching with thumb and three fingers

How to write capital alpha?

What do you call the main part of a joke?

What is an "asse" in Elizabethan English?

What makes a man succeed?

How can I prevent/balance waiting and turtling as a response to cooldown mechanics

Converted a Scalar function to a TVF function for parallel execution-Still running in Serial mode

How often does castling occur in grandmaster games?

How many time has Arya actually used Needle?

How would a mousetrap for use in space work?

What would you call this weird metallic apparatus that allows you to lift people?

Tannaka duality for semisimple groups

Drawing spherical mirrors

preposition before coffee

How to report t statistic from R

Does the Mueller report show a conspiracy between Russia and the Trump Campaign?

Amount of permutations on an NxNxN Rubik's Cube

Why are my pictures showing a dark band on one edge?

What's the difference between the capability remove_users and delete_users?

What's the point of the test set?

How do I find out the mythology and history of my Fortress?

Should a wizard buy fine inks every time he want to copy spells into his spellbook?

Is multiple magic items in one inherently imbalanced?

Did Mueller's report provide an evidentiary basis for the claim of Russian govt election interference via social media?



Can a malicious add-on access internet history and such in Chrome/Firefox?



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)Danger of browser extension without any permissions?How to defend myself against potential malicious browser add-ons?How can I assess the trust worthiness of a browser add-on? Are official browser add-ons really safe?Password management in Firefox, Chrome and SafariIs Adblock (Plus) a security risk?are chrome extensions in the Chrome store generally safe?Spoofing random browser information to defend against fingerprintingFirefox password manager and Firefox SyncChrome users and malicious extensionsHow secure is our privacy when using third party addons and extensions?Can malicious Javascript in local HTML -file send files to internet in Firefox/Chrome?





.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}







18















How does Chrome/Firefox make sure add-ons are safe? Do they have any protection against a malicious add-on?



How much access can add-ons have? Can they access internet history or maybe even cookies and such and send them to a server? Do I need to worry about this?



I do have Kaspersky and Kaspersky add-ons but I still wonder should I still worry about add-ons? Considering there is nothing I can do to make sure some add-ons are malicious or not even if they still have an OK reputation.



EDIT: bonus question, if an addon says it can read the data on websites you visit, does it mean it can know which websites I visit and technically can send them to a server and basically record my history this way ? (considering many adblockers and such addons have this permission)










share|improve this question































    18















    How does Chrome/Firefox make sure add-ons are safe? Do they have any protection against a malicious add-on?



    How much access can add-ons have? Can they access internet history or maybe even cookies and such and send them to a server? Do I need to worry about this?



    I do have Kaspersky and Kaspersky add-ons but I still wonder should I still worry about add-ons? Considering there is nothing I can do to make sure some add-ons are malicious or not even if they still have an OK reputation.



    EDIT: bonus question, if an addon says it can read the data on websites you visit, does it mean it can know which websites I visit and technically can send them to a server and basically record my history this way ? (considering many adblockers and such addons have this permission)










    share|improve this question



























      18












      18








      18








      How does Chrome/Firefox make sure add-ons are safe? Do they have any protection against a malicious add-on?



      How much access can add-ons have? Can they access internet history or maybe even cookies and such and send them to a server? Do I need to worry about this?



      I do have Kaspersky and Kaspersky add-ons but I still wonder should I still worry about add-ons? Considering there is nothing I can do to make sure some add-ons are malicious or not even if they still have an OK reputation.



      EDIT: bonus question, if an addon says it can read the data on websites you visit, does it mean it can know which websites I visit and technically can send them to a server and basically record my history this way ? (considering many adblockers and such addons have this permission)










      share|improve this question
















      How does Chrome/Firefox make sure add-ons are safe? Do they have any protection against a malicious add-on?



      How much access can add-ons have? Can they access internet history or maybe even cookies and such and send them to a server? Do I need to worry about this?



      I do have Kaspersky and Kaspersky add-ons but I still wonder should I still worry about add-ons? Considering there is nothing I can do to make sure some add-ons are malicious or not even if they still have an OK reputation.



      EDIT: bonus question, if an addon says it can read the data on websites you visit, does it mean it can know which websites I visit and technically can send them to a server and basically record my history this way ? (considering many adblockers and such addons have this permission)







      web-browser chrome firefox






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Mar 26 at 18:33







      Mery Ted

















      asked Mar 25 at 15:22









      Mery TedMery Ted

      10016




      10016






















          2 Answers
          2






          active

          oldest

          votes


















          26














          Modern browser extensions use the WebExtensions API, which enforces a permission model; basically, addons can only have the access that you grant them (you can't reject individual permissions though; if you are uncomfortable with some, you can't install the addon).



          Regarding your specific questions:




          • The browser history can only be requested if the history permission is granted.

          • The cookies permission only works along with a host permission which will define which cookies can be accessed. Host permissions are required for all of the sensitive actions (such as injecting JavaScript into a page, reading the contents of a page, etc).


          Malicious extensions can of course execute arbitrary JavaScript in an isolated context, so something like a malicious cryptominer is certainly feasible.



          For access which doesn't require explicit permissions, see my related question: Danger of browser extension without any permissions?.






          share|improve this answer
























          • Thanks for answer, so when you say if permission is granted, do you mean during installation I will be met with a "pop up" that asks me if I'm OK with granting that addon to my history? and if no such popup occurs then it means that addon has no access to history? (I'm asking this because I have never encountered with such popup during installation of my addons)

            – Mery Ted
            Mar 26 at 13:40













          • also a bonus question if you have time to answer: what about sending the visited site url/content to their server immediately after visiting without accessing the history, is this possible for them?

            – Mery Ted
            Mar 26 at 13:47













          • @MeryTed Exactly. It should ask during installation. Chrome eg uses a popup which says "Add [extension]? It can: [permissions; eg 'Read and change all your data on the websites you visit']", Firefox says "Add [extension]? It requires permission to: [...]". What browser are you using?

            – tim
            Mar 26 at 14:29











          • @MeryTed If the permission to history and/or "access/read data on websites you visit" or similar isn't granted, extensions should imho have no primary way to see which websites you visit (there may be side-channels which leak this, but this probably wouldn't leak this to just extensions, but any website, see eg here; extensions may have a bit more options, so the possibility of such an issue may be a bit more likely as compared to websites).

            – tim
            Mar 26 at 14:30













          • so if an addon says it can read data on websites I visit it means it knows which sites I visit and it could technically send it to their server and basically record my history this way? (for example Netcraft Extension addon) (I also use chrome mostly)

            – Mery Ted
            Mar 26 at 18:25





















          9















          how does chrome/firefox make sure addons are safe?




          They inspect them before publishing, and ban those found abusing its rights. But this ban can take from days to weeks.




          how much access can addons have?




          Addons can make anything you can, and more. They can access any server, read any cookie, alter any data, even encrypted by HTTPS, and send any data anywhere. They have to ask your permission when you install, but once you gave permission, for example, to read data on all websites, the addon can read data on all websites you visit.




          should I still worry about addons?




          Yes, you should. If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty.



          What you do? Don't install extensions unless they are from reputable sources, don't need lots and lots of permissions, and are really needed. Installing everything you think is cool will end up compromising your security.






          share|improve this answer





















          • 3





            You may want to add the caveat that extensions request specific permissions. They don't get full access unless they request that and the user approved it at install.

            – Daisetsu
            Mar 25 at 17:03











          • Good point, I added to my answer.

            – ThoriumBR
            Mar 25 at 18:52






          • 1





            "If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty." That's a scandalous claim. Do you have any evidence for this? A study showing the proportion of resold addons that have turned "nasty"? The linked article is interesting but is not sufficient evidence that "the chances are pretty high".

            – Lightness Races in Orbit
            Mar 26 at 11:20













          • So basically if during installation I don't encounter any pop up about permissions of that addons then it means it don't have access to history and etc correct? (because I have never encountered such pop up during installation of my addons in chrome/firefox)

            – Mery Ted
            Mar 26 at 13:42













          • I do not know any sold addon, which did not add something nasty, as long as you let adding tracking and adding advertising count as nasty.

            – allo
            Mar 26 at 13:54












          Your Answer








          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "162"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: false,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          noCode: true, onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsecurity.stackexchange.com%2fquestions%2f206061%2fcan-a-malicious-add-on-access-internet-history-and-such-in-chrome-firefox%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          2 Answers
          2






          active

          oldest

          votes








          2 Answers
          2






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          26














          Modern browser extensions use the WebExtensions API, which enforces a permission model; basically, addons can only have the access that you grant them (you can't reject individual permissions though; if you are uncomfortable with some, you can't install the addon).



          Regarding your specific questions:




          • The browser history can only be requested if the history permission is granted.

          • The cookies permission only works along with a host permission which will define which cookies can be accessed. Host permissions are required for all of the sensitive actions (such as injecting JavaScript into a page, reading the contents of a page, etc).


          Malicious extensions can of course execute arbitrary JavaScript in an isolated context, so something like a malicious cryptominer is certainly feasible.



          For access which doesn't require explicit permissions, see my related question: Danger of browser extension without any permissions?.






          share|improve this answer
























          • Thanks for answer, so when you say if permission is granted, do you mean during installation I will be met with a "pop up" that asks me if I'm OK with granting that addon to my history? and if no such popup occurs then it means that addon has no access to history? (I'm asking this because I have never encountered with such popup during installation of my addons)

            – Mery Ted
            Mar 26 at 13:40













          • also a bonus question if you have time to answer: what about sending the visited site url/content to their server immediately after visiting without accessing the history, is this possible for them?

            – Mery Ted
            Mar 26 at 13:47













          • @MeryTed Exactly. It should ask during installation. Chrome eg uses a popup which says "Add [extension]? It can: [permissions; eg 'Read and change all your data on the websites you visit']", Firefox says "Add [extension]? It requires permission to: [...]". What browser are you using?

            – tim
            Mar 26 at 14:29











          • @MeryTed If the permission to history and/or "access/read data on websites you visit" or similar isn't granted, extensions should imho have no primary way to see which websites you visit (there may be side-channels which leak this, but this probably wouldn't leak this to just extensions, but any website, see eg here; extensions may have a bit more options, so the possibility of such an issue may be a bit more likely as compared to websites).

            – tim
            Mar 26 at 14:30













          • so if an addon says it can read data on websites I visit it means it knows which sites I visit and it could technically send it to their server and basically record my history this way? (for example Netcraft Extension addon) (I also use chrome mostly)

            – Mery Ted
            Mar 26 at 18:25


















          26














          Modern browser extensions use the WebExtensions API, which enforces a permission model; basically, addons can only have the access that you grant them (you can't reject individual permissions though; if you are uncomfortable with some, you can't install the addon).



          Regarding your specific questions:




          • The browser history can only be requested if the history permission is granted.

          • The cookies permission only works along with a host permission which will define which cookies can be accessed. Host permissions are required for all of the sensitive actions (such as injecting JavaScript into a page, reading the contents of a page, etc).


          Malicious extensions can of course execute arbitrary JavaScript in an isolated context, so something like a malicious cryptominer is certainly feasible.



          For access which doesn't require explicit permissions, see my related question: Danger of browser extension without any permissions?.






          share|improve this answer
























          • Thanks for answer, so when you say if permission is granted, do you mean during installation I will be met with a "pop up" that asks me if I'm OK with granting that addon to my history? and if no such popup occurs then it means that addon has no access to history? (I'm asking this because I have never encountered with such popup during installation of my addons)

            – Mery Ted
            Mar 26 at 13:40













          • also a bonus question if you have time to answer: what about sending the visited site url/content to their server immediately after visiting without accessing the history, is this possible for them?

            – Mery Ted
            Mar 26 at 13:47













          • @MeryTed Exactly. It should ask during installation. Chrome eg uses a popup which says "Add [extension]? It can: [permissions; eg 'Read and change all your data on the websites you visit']", Firefox says "Add [extension]? It requires permission to: [...]". What browser are you using?

            – tim
            Mar 26 at 14:29











          • @MeryTed If the permission to history and/or "access/read data on websites you visit" or similar isn't granted, extensions should imho have no primary way to see which websites you visit (there may be side-channels which leak this, but this probably wouldn't leak this to just extensions, but any website, see eg here; extensions may have a bit more options, so the possibility of such an issue may be a bit more likely as compared to websites).

            – tim
            Mar 26 at 14:30













          • so if an addon says it can read data on websites I visit it means it knows which sites I visit and it could technically send it to their server and basically record my history this way? (for example Netcraft Extension addon) (I also use chrome mostly)

            – Mery Ted
            Mar 26 at 18:25
















          26












          26








          26







          Modern browser extensions use the WebExtensions API, which enforces a permission model; basically, addons can only have the access that you grant them (you can't reject individual permissions though; if you are uncomfortable with some, you can't install the addon).



          Regarding your specific questions:




          • The browser history can only be requested if the history permission is granted.

          • The cookies permission only works along with a host permission which will define which cookies can be accessed. Host permissions are required for all of the sensitive actions (such as injecting JavaScript into a page, reading the contents of a page, etc).


          Malicious extensions can of course execute arbitrary JavaScript in an isolated context, so something like a malicious cryptominer is certainly feasible.



          For access which doesn't require explicit permissions, see my related question: Danger of browser extension without any permissions?.






          share|improve this answer













          Modern browser extensions use the WebExtensions API, which enforces a permission model; basically, addons can only have the access that you grant them (you can't reject individual permissions though; if you are uncomfortable with some, you can't install the addon).



          Regarding your specific questions:




          • The browser history can only be requested if the history permission is granted.

          • The cookies permission only works along with a host permission which will define which cookies can be accessed. Host permissions are required for all of the sensitive actions (such as injecting JavaScript into a page, reading the contents of a page, etc).


          Malicious extensions can of course execute arbitrary JavaScript in an isolated context, so something like a malicious cryptominer is certainly feasible.



          For access which doesn't require explicit permissions, see my related question: Danger of browser extension without any permissions?.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Mar 25 at 15:47









          timtim

          24.9k674103




          24.9k674103













          • Thanks for answer, so when you say if permission is granted, do you mean during installation I will be met with a "pop up" that asks me if I'm OK with granting that addon to my history? and if no such popup occurs then it means that addon has no access to history? (I'm asking this because I have never encountered with such popup during installation of my addons)

            – Mery Ted
            Mar 26 at 13:40













          • also a bonus question if you have time to answer: what about sending the visited site url/content to their server immediately after visiting without accessing the history, is this possible for them?

            – Mery Ted
            Mar 26 at 13:47













          • @MeryTed Exactly. It should ask during installation. Chrome eg uses a popup which says "Add [extension]? It can: [permissions; eg 'Read and change all your data on the websites you visit']", Firefox says "Add [extension]? It requires permission to: [...]". What browser are you using?

            – tim
            Mar 26 at 14:29











          • @MeryTed If the permission to history and/or "access/read data on websites you visit" or similar isn't granted, extensions should imho have no primary way to see which websites you visit (there may be side-channels which leak this, but this probably wouldn't leak this to just extensions, but any website, see eg here; extensions may have a bit more options, so the possibility of such an issue may be a bit more likely as compared to websites).

            – tim
            Mar 26 at 14:30













          • so if an addon says it can read data on websites I visit it means it knows which sites I visit and it could technically send it to their server and basically record my history this way? (for example Netcraft Extension addon) (I also use chrome mostly)

            – Mery Ted
            Mar 26 at 18:25





















          • Thanks for answer, so when you say if permission is granted, do you mean during installation I will be met with a "pop up" that asks me if I'm OK with granting that addon to my history? and if no such popup occurs then it means that addon has no access to history? (I'm asking this because I have never encountered with such popup during installation of my addons)

            – Mery Ted
            Mar 26 at 13:40













          • also a bonus question if you have time to answer: what about sending the visited site url/content to their server immediately after visiting without accessing the history, is this possible for them?

            – Mery Ted
            Mar 26 at 13:47













          • @MeryTed Exactly. It should ask during installation. Chrome eg uses a popup which says "Add [extension]? It can: [permissions; eg 'Read and change all your data on the websites you visit']", Firefox says "Add [extension]? It requires permission to: [...]". What browser are you using?

            – tim
            Mar 26 at 14:29











          • @MeryTed If the permission to history and/or "access/read data on websites you visit" or similar isn't granted, extensions should imho have no primary way to see which websites you visit (there may be side-channels which leak this, but this probably wouldn't leak this to just extensions, but any website, see eg here; extensions may have a bit more options, so the possibility of such an issue may be a bit more likely as compared to websites).

            – tim
            Mar 26 at 14:30













          • so if an addon says it can read data on websites I visit it means it knows which sites I visit and it could technically send it to their server and basically record my history this way? (for example Netcraft Extension addon) (I also use chrome mostly)

            – Mery Ted
            Mar 26 at 18:25



















          Thanks for answer, so when you say if permission is granted, do you mean during installation I will be met with a "pop up" that asks me if I'm OK with granting that addon to my history? and if no such popup occurs then it means that addon has no access to history? (I'm asking this because I have never encountered with such popup during installation of my addons)

          – Mery Ted
          Mar 26 at 13:40







          Thanks for answer, so when you say if permission is granted, do you mean during installation I will be met with a "pop up" that asks me if I'm OK with granting that addon to my history? and if no such popup occurs then it means that addon has no access to history? (I'm asking this because I have never encountered with such popup during installation of my addons)

          – Mery Ted
          Mar 26 at 13:40















          also a bonus question if you have time to answer: what about sending the visited site url/content to their server immediately after visiting without accessing the history, is this possible for them?

          – Mery Ted
          Mar 26 at 13:47







          also a bonus question if you have time to answer: what about sending the visited site url/content to their server immediately after visiting without accessing the history, is this possible for them?

          – Mery Ted
          Mar 26 at 13:47















          @MeryTed Exactly. It should ask during installation. Chrome eg uses a popup which says "Add [extension]? It can: [permissions; eg 'Read and change all your data on the websites you visit']", Firefox says "Add [extension]? It requires permission to: [...]". What browser are you using?

          – tim
          Mar 26 at 14:29





          @MeryTed Exactly. It should ask during installation. Chrome eg uses a popup which says "Add [extension]? It can: [permissions; eg 'Read and change all your data on the websites you visit']", Firefox says "Add [extension]? It requires permission to: [...]". What browser are you using?

          – tim
          Mar 26 at 14:29













          @MeryTed If the permission to history and/or "access/read data on websites you visit" or similar isn't granted, extensions should imho have no primary way to see which websites you visit (there may be side-channels which leak this, but this probably wouldn't leak this to just extensions, but any website, see eg here; extensions may have a bit more options, so the possibility of such an issue may be a bit more likely as compared to websites).

          – tim
          Mar 26 at 14:30







          @MeryTed If the permission to history and/or "access/read data on websites you visit" or similar isn't granted, extensions should imho have no primary way to see which websites you visit (there may be side-channels which leak this, but this probably wouldn't leak this to just extensions, but any website, see eg here; extensions may have a bit more options, so the possibility of such an issue may be a bit more likely as compared to websites).

          – tim
          Mar 26 at 14:30















          so if an addon says it can read data on websites I visit it means it knows which sites I visit and it could technically send it to their server and basically record my history this way? (for example Netcraft Extension addon) (I also use chrome mostly)

          – Mery Ted
          Mar 26 at 18:25







          so if an addon says it can read data on websites I visit it means it knows which sites I visit and it could technically send it to their server and basically record my history this way? (for example Netcraft Extension addon) (I also use chrome mostly)

          – Mery Ted
          Mar 26 at 18:25















          9















          how does chrome/firefox make sure addons are safe?




          They inspect them before publishing, and ban those found abusing its rights. But this ban can take from days to weeks.




          how much access can addons have?




          Addons can make anything you can, and more. They can access any server, read any cookie, alter any data, even encrypted by HTTPS, and send any data anywhere. They have to ask your permission when you install, but once you gave permission, for example, to read data on all websites, the addon can read data on all websites you visit.




          should I still worry about addons?




          Yes, you should. If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty.



          What you do? Don't install extensions unless they are from reputable sources, don't need lots and lots of permissions, and are really needed. Installing everything you think is cool will end up compromising your security.






          share|improve this answer





















          • 3





            You may want to add the caveat that extensions request specific permissions. They don't get full access unless they request that and the user approved it at install.

            – Daisetsu
            Mar 25 at 17:03











          • Good point, I added to my answer.

            – ThoriumBR
            Mar 25 at 18:52






          • 1





            "If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty." That's a scandalous claim. Do you have any evidence for this? A study showing the proportion of resold addons that have turned "nasty"? The linked article is interesting but is not sufficient evidence that "the chances are pretty high".

            – Lightness Races in Orbit
            Mar 26 at 11:20













          • So basically if during installation I don't encounter any pop up about permissions of that addons then it means it don't have access to history and etc correct? (because I have never encountered such pop up during installation of my addons in chrome/firefox)

            – Mery Ted
            Mar 26 at 13:42













          • I do not know any sold addon, which did not add something nasty, as long as you let adding tracking and adding advertising count as nasty.

            – allo
            Mar 26 at 13:54
















          9















          how does chrome/firefox make sure addons are safe?




          They inspect them before publishing, and ban those found abusing its rights. But this ban can take from days to weeks.




          how much access can addons have?




          Addons can make anything you can, and more. They can access any server, read any cookie, alter any data, even encrypted by HTTPS, and send any data anywhere. They have to ask your permission when you install, but once you gave permission, for example, to read data on all websites, the addon can read data on all websites you visit.




          should I still worry about addons?




          Yes, you should. If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty.



          What you do? Don't install extensions unless they are from reputable sources, don't need lots and lots of permissions, and are really needed. Installing everything you think is cool will end up compromising your security.






          share|improve this answer





















          • 3





            You may want to add the caveat that extensions request specific permissions. They don't get full access unless they request that and the user approved it at install.

            – Daisetsu
            Mar 25 at 17:03











          • Good point, I added to my answer.

            – ThoriumBR
            Mar 25 at 18:52






          • 1





            "If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty." That's a scandalous claim. Do you have any evidence for this? A study showing the proportion of resold addons that have turned "nasty"? The linked article is interesting but is not sufficient evidence that "the chances are pretty high".

            – Lightness Races in Orbit
            Mar 26 at 11:20













          • So basically if during installation I don't encounter any pop up about permissions of that addons then it means it don't have access to history and etc correct? (because I have never encountered such pop up during installation of my addons in chrome/firefox)

            – Mery Ted
            Mar 26 at 13:42













          • I do not know any sold addon, which did not add something nasty, as long as you let adding tracking and adding advertising count as nasty.

            – allo
            Mar 26 at 13:54














          9












          9








          9








          how does chrome/firefox make sure addons are safe?




          They inspect them before publishing, and ban those found abusing its rights. But this ban can take from days to weeks.




          how much access can addons have?




          Addons can make anything you can, and more. They can access any server, read any cookie, alter any data, even encrypted by HTTPS, and send any data anywhere. They have to ask your permission when you install, but once you gave permission, for example, to read data on all websites, the addon can read data on all websites you visit.




          should I still worry about addons?




          Yes, you should. If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty.



          What you do? Don't install extensions unless they are from reputable sources, don't need lots and lots of permissions, and are really needed. Installing everything you think is cool will end up compromising your security.






          share|improve this answer
















          how does chrome/firefox make sure addons are safe?




          They inspect them before publishing, and ban those found abusing its rights. But this ban can take from days to weeks.




          how much access can addons have?




          Addons can make anything you can, and more. They can access any server, read any cookie, alter any data, even encrypted by HTTPS, and send any data anywhere. They have to ask your permission when you install, but once you gave permission, for example, to read data on all websites, the addon can read data on all websites you visit.




          should I still worry about addons?




          Yes, you should. If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty.



          What you do? Don't install extensions unless they are from reputable sources, don't need lots and lots of permissions, and are really needed. Installing everything you think is cool will end up compromising your security.







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Mar 25 at 18:52

























          answered Mar 25 at 15:35









          ThoriumBRThoriumBR

          24.8k85875




          24.8k85875








          • 3





            You may want to add the caveat that extensions request specific permissions. They don't get full access unless they request that and the user approved it at install.

            – Daisetsu
            Mar 25 at 17:03











          • Good point, I added to my answer.

            – ThoriumBR
            Mar 25 at 18:52






          • 1





            "If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty." That's a scandalous claim. Do you have any evidence for this? A study showing the proportion of resold addons that have turned "nasty"? The linked article is interesting but is not sufficient evidence that "the chances are pretty high".

            – Lightness Races in Orbit
            Mar 26 at 11:20













          • So basically if during installation I don't encounter any pop up about permissions of that addons then it means it don't have access to history and etc correct? (because I have never encountered such pop up during installation of my addons in chrome/firefox)

            – Mery Ted
            Mar 26 at 13:42













          • I do not know any sold addon, which did not add something nasty, as long as you let adding tracking and adding advertising count as nasty.

            – allo
            Mar 26 at 13:54














          • 3





            You may want to add the caveat that extensions request specific permissions. They don't get full access unless they request that and the user approved it at install.

            – Daisetsu
            Mar 25 at 17:03











          • Good point, I added to my answer.

            – ThoriumBR
            Mar 25 at 18:52






          • 1





            "If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty." That's a scandalous claim. Do you have any evidence for this? A study showing the proportion of resold addons that have turned "nasty"? The linked article is interesting but is not sufficient evidence that "the chances are pretty high".

            – Lightness Races in Orbit
            Mar 26 at 11:20













          • So basically if during installation I don't encounter any pop up about permissions of that addons then it means it don't have access to history and etc correct? (because I have never encountered such pop up during installation of my addons in chrome/firefox)

            – Mery Ted
            Mar 26 at 13:42













          • I do not know any sold addon, which did not add something nasty, as long as you let adding tracking and adding advertising count as nasty.

            – allo
            Mar 26 at 13:54








          3




          3





          You may want to add the caveat that extensions request specific permissions. They don't get full access unless they request that and the user approved it at install.

          – Daisetsu
          Mar 25 at 17:03





          You may want to add the caveat that extensions request specific permissions. They don't get full access unless they request that and the user approved it at install.

          – Daisetsu
          Mar 25 at 17:03













          Good point, I added to my answer.

          – ThoriumBR
          Mar 25 at 18:52





          Good point, I added to my answer.

          – ThoriumBR
          Mar 25 at 18:52




          1




          1





          "If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty." That's a scandalous claim. Do you have any evidence for this? A study showing the proportion of resold addons that have turned "nasty"? The linked article is interesting but is not sufficient evidence that "the chances are pretty high".

          – Lightness Races in Orbit
          Mar 26 at 11:20







          "If you use an addon that was abandoned and the owner sold it to someone else, chances are pretty high that the new owner will do something nasty." That's a scandalous claim. Do you have any evidence for this? A study showing the proportion of resold addons that have turned "nasty"? The linked article is interesting but is not sufficient evidence that "the chances are pretty high".

          – Lightness Races in Orbit
          Mar 26 at 11:20















          So basically if during installation I don't encounter any pop up about permissions of that addons then it means it don't have access to history and etc correct? (because I have never encountered such pop up during installation of my addons in chrome/firefox)

          – Mery Ted
          Mar 26 at 13:42







          So basically if during installation I don't encounter any pop up about permissions of that addons then it means it don't have access to history and etc correct? (because I have never encountered such pop up during installation of my addons in chrome/firefox)

          – Mery Ted
          Mar 26 at 13:42















          I do not know any sold addon, which did not add something nasty, as long as you let adding tracking and adding advertising count as nasty.

          – allo
          Mar 26 at 13:54





          I do not know any sold addon, which did not add something nasty, as long as you let adding tracking and adding advertising count as nasty.

          – allo
          Mar 26 at 13:54


















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Information Security Stack Exchange!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fsecurity.stackexchange.com%2fquestions%2f206061%2fcan-a-malicious-add-on-access-internet-history-and-such-in-chrome-firefox%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          Popular posts from this blog

          Nidaros erkebispedøme

          Birsay

          Was Woodrow Wilson really a Liberal?Was World War I a war of liberals against authoritarians?Founding Fathers...