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by XcomeX

24 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 4 out of 5 stars 2,063 reviews

1,820,843 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

Awesome Screenshot Plus - Capture, Annotate & More by Diigo Inc.

Rated 4 out of 5 stars 1,418 reviews

453,405 users

Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 1,019 reviews

1,146,658 users

Customize the way a web page displays or behaves, by using small bits of JavaScript.

Tab Mix Plus by onemen, Gary Reyes

Rated 4 out of 5 stars 2,390 reviews

743,894 users

Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.

Classic Theme Restorer by Aris

Rated 5 out of 5 stars 1,041 reviews

412,075 users

Squared tabs, appmenu, add-on bar, small button view and many more 'old' features for Firefox 29-56 (Windows / MacOSX / Linux).

Release builds
Beta builds

Speed Dial by Josep del Rio

Rated 4 out of 5 stars 1,215 reviews

320,928 users

Direct access to your most visited websites

Flashblock by Philip Chee

Rated 4 out of 5 stars 1,133 reviews

486,250 users

Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...

Session Manager by Michael Kraft

Rated 4 out of 5 stars 458 reviews

283,075 users

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 371 reviews

228,449 users

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

Beyond Australis by Quicksaver

Rated 5 out of 5 stars 342 reviews

37,738 users

Australis was the code name for the current Firefox theme, it aimed to make a great browser look awesome. Now you can go one step further and also make it feel awesome to use!

PDF Download by Nitro PDF Software

Download Now

Experimental

Rated 2 out of 5 stars 690 reviews

58,484 users

Use PDF Download to do whatever you like with PDF files on the Web. Regain control and eliminate browser problems, view PDFs directly in Firefox as HTML, and use the all-new Web-to-PDF toolbar to save and share Web pages as high-quality PDF files.

Hide Caption Titlebar Plus by Javier "DarthMadara"

Rated 5 out of 5 stars 413 reviews

30,436 users

"Maximize your screen space by adjusting Firefox window TitleBar, borders, Tabs, Toolbars, etc!", with 'smart' options, *optional* custom caption & resizers.  
Multiple Configurable Actions for both screen-corner buttons: Firefox & Close buttons!

Configuration Mania by @cat_in_136 (a.k.a. Popoki Tom)

Rated 4 out of 5 stars 101 reviews

29,083 users

More Advanced (hidden) configures

QuickMark by Martijn Joosstens

Rated 5 out of 5 stars 50 reviews

11,873 users

A quick and minimalistic way to create bookmarks.

about:addons-memory by Nils Maier

Download Now

Experimental

Rated 4 out of 5 stars 131 reviews

29,335 users

Adds an about:addons-memory page that details add-on memory usage
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