Promising

by Firebreathing

22 Add-ons in this Collection

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 336 reviews

373 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

SQLite Manager by lazierthanthou

Rated 4 out of 5 stars 354 reviews

269 users

Manage any SQLite database on your computer.

Menu Wizard by Oleksandr

Rated 5 out of 5 stars 252 reviews

1,717 users

Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey

Download Status Bar by Szalgiris

Rated 5 out of 5 stars 437 reviews

263 users

If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.

Live HTTP Headers (clone) by Earthling

Rated 4 out of 5 stars 17 reviews

5 users

View HTTP headers of a page and while browsing.

This is an unofficial "Live HTTP headers" clone, mainly to fix the Replay feature!

ChatZilla by Gijs Kruitbosch, Robert Ginda, others

Rated 4 out of 5 stars 150 reviews

25,580 users

A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

RefControl by James Abbatiello

Rated 4 out of 5 stars 180 reviews

40 users

Control what gets sent as the HTTP Referer on a per-site basis.

Dorando keyconfig by trlkly, Jonathan Kamens

Rated 5 out of 5 stars 65 reviews

908 users

A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)

As of version 2016.2, Custom keys (using custom JavaScript) work again!

Stylish-Custom by ChoGGi

Rated 4 out of 5 stars 10 reviews

35 users

custom additions to Stylish extension

Custom Buttons by Yan, cubegm, others

Rated 4 out of 5 stars 125 reviews

104 users

Gives a possibility to create custom toolbarbuttons...

No Resource URI Leak by Desktopd Collaboration, nord-stream

Rated 4 out of 5 stars 31 reviews

26 users

Deny resource:// access to Web content: We fill the hole to defend against fingerprinting. Very important to Firefox privacy. A direct workaround for bugzil.la/863246

Scriptish by Erik Vold, Nils Maier, others

Rated 4 out of 5 stars 109 reviews

27 users

The greatest user script engine on the Internet (a fork of Greasemonkey).

Copy Plain Text 2 by Leszek Życzkowski

Rated 5 out of 5 stars 98 reviews

177 users

Copies text without formatting

Redirect Bypasser by Moises Lima

Rated 4 out of 5 stars 55 reviews

17 users

Avoid redirects and has direct access to the sites you want to visit.

QuickDrag by Stevie Smith

Download Now

Experimental

Rated 4 out of 5 stars 324 reviews

10 users

Extends the function of the drag-and-drop mouse gesture so that it can be used to load URLs, do a web search of selected text on a page, or save an image on a page. The successor to Super DragAndGo.
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