Firefox is a Web browser that is smaller, faster, and in some ways more secure than the Netscape browser from which much of its code was derived.

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7
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2answers
1k views

Is “Fingerprint Check” enough to verify HTTPS certificates?

So I'm at place A, see this sign: and I'm writing the fingerprints to a piece of paper (this website is just an example): Ok. Then, I go to place B (other country, etc.) then I check this ...
7
votes
2answers
14k views

How do some sites detect AdBlock Plus? [closed]

For example this one disables function if AdBlock plus is detected, and it works. Is there a way to circumvent this?
10
votes
2answers
583 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?
1
vote
1answer
201 views

Canvas and Firefox

I have received this notification on Tor Browser (Firefox). What is it?
11
votes
2answers
414 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 ...
3
votes
4answers
742 views

FireFox's restore previous session restores logins authenticated by server's sessions

In a website I'm building when I login, close FireFox, open FireFox and try to go to the website again I must login again (as expected) BUT if I select "Restore Previous Session" I am logged in again. ...
16
votes
3answers
1k views

What security risks does Firefox 19's built-in PDF reader (pdf.js) bring?

Firefox 19 ships with pdf.js as the default PDF reader. One of the main stated goals is to reduce the exposure of users to the often vulnerable Adobe PDF reader/plugin. So what new risks does pdf.js ...
1
vote
2answers
13k views

Error code: sec_error_untrusted_issuer

I need help with a security issue concerning this code that has just been popping up recently as I visit my favorite websites. Based on some past history I KNOW something is not right, and I am not ...
15
votes
4answers
741 views

Firefox pre-downloading

I've found out that if you download a file with Firefox, a similar window as this one pops up (in dutch in my case): ("Bestand opslaan" = "Save file") However, the file is already being ...
0
votes
1answer
1k views

Retrieving saved password from Firefox on Linux [closed]

I know there are ways to get the cookies from browsers in Windows and retrieve and decrypt saved passwords from them. Is there a similar way to do so on CentOS?
5
votes
1answer
209 views

Is this a security flaw in Firefox 18.0?

I had a couple of .mht files which opened in IE, a browser I never use. I renamed their extension to .HTML to run it in Firefox. When I opened the file in Firefox, Firefox created new tabs endlessly. ...
4
votes
2answers
147 views

Can webpages recognize that I saved my password?

If you save your logins in Firefox, username and password are auto-filled-in in corresponding webpages as soon as you visit them (if you have more than 1 account saved, you'd have to select a username ...
1
vote
2answers
267 views

Is it possible to block third party cookies but allow them when they are first party?

I have been using Cookie Monster in Firefox for a while now to great satisfaction. However, I haven't found a way to allow cookies like Google's on Google's services but block them when I visit other ...
5
votes
5answers
571 views

HOWTO : Email encryption in a browser

I have read about encryption and I think it's a good idea for me to encrypt my email. I run ubuntu 12.10 and use Firefox for browsing. In my quest for learning how to use gmail/hotmail to send and ...
-1
votes
2answers
587 views

Modifiy Webbrowser User Agent to what? [closed]

I originally have this useragent (normal DesktopPC): Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:16.0) Gecko/20100101 Firefox/16.0 but if I usually modifiy it to: New -> String ...
3
votes
2answers
142 views

Why firefox shows some connections are not secure?

I am using internet by connecting mobile phone to my laptop using usb. From yesterday,my browser (firefox) shows for all most all website. Why this happen? How can i solve this?
1
vote
3answers
463 views

Should I use a Firefox master password or NTFS encrypt my profile?

As a follow-up to another question, is the encryption via Firefox' master password more secure than simply NTFS encrypting the profile folder? I.e. is there a convincing reason to add the ...
3
votes
2answers
2k views

How does Firefox securely store my SSL certificate?

I'm currently testing a free personal SSL certificate (S/MIME client / authentication) from https://www.startssl.com, which installed directly into Firefox. Now when I store backup, I have to enter a ...
0
votes
1answer
402 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 ...
3
votes
2answers
2k views

Do most browsers handle mixed encrypted and unencrypted content correctly?

In Google Chrome, when I go to an encrypted page that contains unencrypted content, I get the following pop-down, which allows me to either load or not load the insecure content, making a clear ...
-1
votes
2answers
312 views

Restore session in Firefox

Restore session in Firefox What does this mean, is it related to the session concept which is stored on the web server? If I stop the computer with my web-app, and then start it again before the ...
3
votes
1answer
2k views

Firefox Flash plugin malware?

I am running firefox 11 on ubuntu 10.04 and every time I close the program it continues to run in the background. What worries me even more is that the flash plugin is also running in the background: ...
2
votes
1answer
247 views

FireFox Download Source

While downloading the latest version of Firefox for Mac, i took a peek at the source. The names don't look legit but i am not that familiar with how CDNs work. I hit download multiple times and ...
0
votes
3answers
2k views

Firefox detected an invalid SSL certificate

February 14, 2012 UTC: Yesterday, I connected to a website of a VPN provider for which Firefox 8.0.1 on Windows 7 Ultimate x86-64 stated that its' SSL certificate is invalid. I saved the received ...
-1
votes
1answer
100 views

Why are there soo many HTTP connections when using Convergence?

I installed Convergence on Firefox 9.0.1: http://convergence.io/ but... after I installed/enabled it when I visit a HTTPS only-site there are many-many HTTP traffic to the notary servers. Why? ...
2
votes
2answers
2k views

Can Tamper Data (the plugin) modify multipart requests?

I'm doing some testing on my web app with Tamper Data. I've had success with Tamper Data in the past for normal HTTP post requests, but in this particular case I want to modify a post request that ...
0
votes
1answer
145 views

Firefox Add-ons: “x” as Add-on name? [closed]

Is this normal? Why is the Add-on named "x"? - not just this one, any add-on that I want to install named "x".. Why? p.s.: from the https://addons.mozilla.org/en-US/firefox/ site
7
votes
2answers
300 views

Do I have to harden IE if I'm only using Firefox?

Assume a Windows 7 system (probably whatever home version comes with the machine), with the latest OS patches, latest IE and latest Firefox. Also assume that the user uses only Firefox for browsing, ...
11
votes
2answers
936 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?