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by sacrifice

15 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,861 reviews

20,780,432 users

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,766 reviews

2,375,387 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...

Flashblock by Philip Chee

Rated 4 out of 5 stars 1,142 reviews

784,280 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...

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 300 reviews

261,303 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 328 reviews

151,406 users

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

YSlow by YSlow

Rated 3 out of 5 stars 186 reviews

110,523 users

YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.

Html Validator by Marc Gueury

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Firefox 23+, you need 0.958 (under review)
http://users.skynet.be/mgueury/mozilla

Extended Statusbar by Strahinja Kustudić

Rated 4 out of 5 stars 249 reviews

52,341 users

A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)

Firecookie by Jan Odvarko

Rated 4 out of 5 stars 61 reviews

4,862 users

Firecookie is an extension for Firebug that makes possible to view and manage cookies in your browser

Firecookie is part of Firebug since Firebug 1.10

Screengrab by Andy M

Rated 4 out of 5 stars 589 reviews

30,344 users

Screengrab! saves webpages as images... but not for new versions of Firefox.

FF changes too fast and I don't have the time to maintain it anymore. Bugs have developed that I am not in a position to investigate.

Therefore, Screengrab is EOL.

QuickProxy by Ozzie-

Rated 4 out of 5 stars 208 reviews

25,220 users

Statusbar button to turn the proxy on and off with a single click.

Header Spy by IronNem

Rated 4 out of 5 stars 18 reviews

8,867 users

Shows HTTP headers on statusbar.

Hide Menubar by yuoo2k

Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.

dragdropupload by sankazim

Rated 4 out of 5 stars 175 reviews

2,056 users

Drop files into attachment boxes instead of browse for them or type in the filename. Drop multiple files and fill all the entries. In some websites it allows to add new upload files: in Google Mail is possible to drop the files directly over the...

Clear Private Data... + by Mr. E

Rated 4 out of 5 stars 37 reviews

522 users

This extension makes Firefox' "Clear Private Data..." feature more accessible.

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