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Flagfox

Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...

Rated 5 out of 5 stars (665)
381,400 users
Updated June 21, 2017

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (6)
845 users
Updated June 19, 2017

Classic Toolbar Buttons

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions.

Beta builds on versions page!

Rated 5 out of 5 stars (132)
32,913 users
Updated June 17, 2017

fixedzoomthumb Requires Restart

Shows fixed size image when you hover over a thumbnail and it is permanent till we don't hover anywhere on a web page. Press s to save the image directly.Works with many sites including Amazon, Facebook, Flickr, YouTube.

Rated 5 out of 5 stars (2)
3 users
Updated June 17, 2017

Open With Photoshop

Open With Photoshop is a new companion for web and graphic designers to open up any web image with Adobe Photoshop via a single and quick mouse click.

Rated 5 out of 5 stars (69)
13,254 users
Updated June 16, 2017

Screengrab (fix version) Requires Restart

Screengrab! saves webpages as images.
0.99 released!
New features: upload to internet

Rated 5 out of 5 stars (257)
107,065 users
Updated June 3, 2017

NoScript Security Suite Requires Restart Featured

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

Rated 5 out of 5 stars (1,569)
1,953,715 users
Updated May 30, 2017

Tiny JavaScript Debugger Requires Restart

TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavaScript.

Rated 4 out of 5 stars (8)
28,275 users
Updated May 29, 2017

Link Properties Plus Requires Restart

Provides extended link properties: size of linked file, last modified time, etc.

Rated 5 out of 5 stars (14)
1,431 users
Updated May 28, 2017

Nightly Tester Tools Requires Restart

Useful tools for the nightly tester.

Rated 4 out of 5 stars (185)
18,284 users
Updated May 16, 2017

Add-ons Manager - Version Number

Restores version numbers for all installed add-ons inside Add-on Manager on Firefox, Thunderbird and Seamonkey.

Rated 5 out of 5 stars (21)
1,717 users
Updated May 10, 2017

Composer Open In Requires Restart

Adds a toolbar button to Composer to open the current file in another editor or browser.

Not yet rated
5 users
Updated May 2, 2017

Element Hiding Helper for Adblock Plus

Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.

Rated 5 out of 5 stars (431)
404,510 users
Updated April 12, 2017

Web Developer Requires Restart

The Web Developer extension adds various web developer tools to the browser.

Rated 5 out of 5 stars (265)
345,869 users
Updated April 5, 2017

Element Inspector

In the DOM Inspector,quickly navigate to the any elements

Rated 5 out of 5 stars (33)
3,487 users
Updated March 25, 2017

Open With Requires Restart

Quickly test out your web pages in Internet Explorer, Chrome, Safari, or Opera. Open With opens the current page in your other browsers with just one click. Add Open With to your menus, toolbars and developer toolbox today!

Rated 4 out of 5 stars (159)
20,801 users
Updated March 21, 2017

Addons Memory Usage - Button Requires Restart

Add toolbar button for about-addons-memory-pm

But not only, also provide shortcuts for :

- Free Memory (needs free memory button)
- Abouts list page (about:about)
- Plugins page (about:plugins)

github.com/intika/about-addons-memory-pm

Rated 2 out of 5 stars (1)
170 users
Updated March 17, 2017

Modify HTTP Response

Rewrite http response body using search & replace patterns

Rated 4 out of 5 stars (5)
795 users
Updated February 13, 2017

FoxyProxy Basic Requires Restart

FoxyProxy Basic is a simple on/off proxy switcher. More advanced features and configuration options are offered by FoxyProxy Standard.

Rated 4 out of 5 stars (31)
18,548 users
Updated January 28, 2017

FoxyProxy Standard Requires Restart

FoxyProxy is an advanced proxy management tool that completely replaces Firefox's limited proxying capabilities. For a simpler tool and less advanced configuration options, please use FoxyProxy Basic.

Rated 4 out of 5 stars (385)
227,052 users
Updated January 28, 2017