Browser extensions are additions to a web browser that provide extra functionality.

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are webmalware able to hijack browsers?

Are webmalwares capbale of performing browser hijacking attacks ? Has there been any famous webmalware that functioned this way ?
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1answer
57 views

Simple protection against reflected XSS

I was going through some CLIENT side defenses against reflected XSS e.g. XSS auditor(chrome), IE8 XSS Filters, Noscript. They use regular expression and other sophisticated techniques. My question ...
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Is Google Chrome Extension access to SSL certificate validation output possible?

I want to develop an extension which will stop an user from proceeding to any banking site (configurable by user) if a proxy like paros is seating in between sending fake certificate to user. My ...
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0answers
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What part of the browser is typically attacked? [closed]

Pretty sure that browsers are compromised most often through their plugins, at least, that's what I keep reading. So, then, does that mean the browser itself has vulnerabilities, and the plugins are ...
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0answers
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Question about the Perspectives add-on, is this dangerous?

When I visited Google and Facebook, and then clicked on the Perspectives add-on button to check the certificate information, I saw this:     What does this mean? Shouldn't it have ...
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1answer
82 views

Which Browsers support TACK?

TACK is an IETF draft that allows certificate pinning for a TLS web server, provided the clients' bowsers support it. Unlike the certificate pinning feature available with HSTS preloading, the ...
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2answers
169 views

Do Chrome/browser extensions break the tab sandbox?

So, as far as I know, Chrome and possibly other browsers have a very low privilege process spawned for every tab. How do browser extensions interact in regard to this sandboxing? I'm not talking ...
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Is Adblock (Plus) a security risk?

My email-provider's website (http://www.gmx.de) recently started linking to the (German) site http://www.browsersicherheit.info/ which basically claims that due to its capabilities to modify a site's ...
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1answer
877 views

Is Vimium (Chrome extension) really safe?

I really like the Chrome extension Vimium. It significantly speeds up surfing for power users. However, when you install it, Chrome warns you because this extension injects JS code on every page you ...
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1answer
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Browser Extension to show how your session is being shared

A while back I came across a browser extension (was available for Firefox and Chrome, maybe others) that showed you through a graphical 'node' interface how your browser session was shared with so ...
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132 views

Reflected XSS Prevention plugin [closed]

Is there any plugin out there which prevent reflected XSS? Plugin could be either for firefox or chrome. Thanks.
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2answers
333 views

how to view extension privileges in firefox

In Google Chrome, I can go to chrome://extensions/ and click "permissions" to view the permissions that an installed extension has been granted. I cannot find an equivalent in Firefox. Is there such ...
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Browser based virtual machines

How would applying hypervisor (e.g. xen) principles in the development of a web browser offering isolated browser tabs (virtual machines) improve or reduce security of existing web applications (good ...
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1answer
195 views

Twitter.com in private browsing leaks data to normal browser. Other sites as well? Bug or feature?

This is the first time I encountered similar thing. When I log into the Twitter web site in Chrome (namely, the Iron version which is said to be security enhanced, but that does not matter here) in ...
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1answer
186 views

When a browser extension or user script pulls a JS file from Google's CDN, how does this compromise the user's privacy in terms of Google's reach? [duplicate]

The context from which my question has arisen is this user script which locally removes ads from Ixquick.com, which is an anonymizing 'proxy' search engine that gives the results from Google's index ...
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2answers
264 views

Injecting information in a web page (Gmail). Does it raise security problem?

I am developing a Google Chrome extension which encrypts/decrypts emails for Gmail users. So, I detect encrypted emails when the user opens an email on using tags. Once an encrypted email has been ...
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2answers
274 views

Ways to obfuscate web browsing habits [duplicate]

Web browsing metadata provides a lot of insight on person's habits. How can I reduce that insight? Is there something like "Detachment 2702" (http://en.wikipedia.org/wiki/Cryptonomicon) plugin for ...
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3answers
683 views

Are official browser add-ons really safe?

Almost any browser addon/extension that I install on my Chrome or Firefox (be it Firebug, RESTClient, ...) warns me, saying: It [the add-on] can: Access your data on all website Access ...
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1answer
311 views

Signing a browser extension

I want to make a browser extension available to users. Can I sign my extension so that users can verify it is authentic, without needing to trust the web site where they got the extension from nor ...
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3answers
1k views

What bad coding practices makes a browser extension vulnerable?

I'm trying to scan JavaScript files for vulnerabilities using JSHint. Specifically, I'm scanning the JavaScript files of browser extensions. To look for possible vulnerabilities I'm looking for bad ...
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448 views

Any tool for scanning vulnerabilities in browser extensions?

I am scanning browser extensions of Chrome and Firefox for vulnerabilities. Is there any tool which would help me do this?
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2answers
379 views

What should I look for when auditing a Firefox extension / plugin?

I've been asked to do a security audit on a Firefox add-on developed by a third party. I am a web developer with a reasonable grasp of JavaScript but am not a browser security expert. What kinds of ...
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1answer
351 views

How securely use Firefox Add-on to prevent steal data?

Some videos on YouTube demonstrate how a Firefox extension can collect login information used to login to websites such as Facebook. After installing this tool/malware as Firefox Add-on, I observed ...
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4answers
1k views

Is using “HTTPS everywhere” extension secure?

I would like to know if one should use 'HTTPS everywhere' extension? Is it secure to use it? Are there any better alternatives? HTTPS Everywhere is a Firefox and Chrome extension that encrypts ...
3
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1answer
307 views

Find malware in browser extensions

How can I check if an extension/addon consist of malware code? Is it easy to detect if it collects sensitive data (like spyware), logging keystrokes and so on? Can AV recognize malware extension as ...
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1answer
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How do I check the code of a Chrome extension to make sure it's not stealing my info?

I've been reading more and more about just how much access browser extensions can have to your data. This is a little unsettling, so I'm curious if there is a way to Vet these extensions and make sure ...
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2answers
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Why do Chrome extensions need access to 'all my data' and 'browsing activity'?

Often I install simple add-ons for Google Chrome. However, they almost all need what appears to me as excessive access to my data. For instance, I install an extension that allows me to click on any ...
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2answers
765 views

Are Google Chrome Extensions vulnerable?

I've just discovered this: You can create IFRAME pointing to "chrome-extension://" protocol You can access IFRAME content with jQuery Does this mean, I'm able to use badly written Chrome ...
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2answers
867 views

Can a Firefox add-on or plug-in access the user's websites' saved passwords in decrypted mode?

Going deeper into the previous question on Firefox plugins and add-ons malware risks: Could a Firefox add-on potentially decode and capture the encrypted websites' passwords saved in the browser?