To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!Close
Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Hide My IP No Restart
Hide My IP is number one tool for hiding your IP and unblocking any web site!
Custom User-Agent String No Restart
Set custom User-Agent string. Also available for Firefox on Android.
HTTP/2 and SPDY indicator No Restart
An indicator showing HTTP/2 and SPDY support in the address bar.
Selenium IDE is an integrated development environment for Selenium tests. It is implemented as a Firefox extension, and allows you to record, edit, and debug tests.
Configures Mozilla Firefox for use with Charles Web Debugging Proxy.
VebTraffic.com site viewer. No Restart
Peer 2 Peer traffic sharing internet service
Using our Firefox plugin will allow you to earn free traffic for your website from users around the World.
Saving form data to bookmarklets
Enter up to 5 equations into this toolbar, then view the graphs using Firefox native SVG support. The toolbar allows rescaling the x and y coordinates and redefining the domain. Contributions go directly to the Boys & Girls Club.
No more Ctrl+C / V. Fastest way to copy and paste. Copy with and without formatting! Quickly Tun On and OFF copy paste feature when you need it.
Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.
Textise No Restart
Creates a text-only version of almost any web page. Great for accessibility, SEO and printing.
Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.
FireMath is an equation editor based on MathML, the mathematical markup language.
Find examples, FAQ, installation instructions and a discussion board at
Speed up scientific scripting! Improve your science!
SEO Extension SERPTrends for Firefox is a lightweight SEO tool which shows dynamics for the search results within the search page: whether the website moved up, down in the SERP, just appeared (is "new") or hasn't changed its position.
Autofill is a small but powerful add-on that serves one purpose: fill form fields automatically on page load. It is for people who just want a straightforward form filler without all the bells and whistles.
Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.
Exports all cookies in IE manner.
Makes a Netscape standard cookies.txt file.
Very useful for WGET --load-cookies option.
Signature functions for Selenium IDE