My Favorite Add-ons

by madvic

24 Add-ons in this Collection

Adblock Plus by Eyeo

Rated 5 out of 5 stars 7,036 reviews

13,154,712 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 4 out of 5 stars 2,588 reviews

992,063 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...

Web Developer by chrispederick

Rated 4 out of 5 stars 461 reviews

290,413 users

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

ColorZilla by Alex Sirota

Rated 4 out of 5 stars 422 reviews

190,558 users

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

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 362 reviews

71,919 users

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

Firefinder for Firebug by Robert Nyman

Rated 3 out of 5 stars 28 reviews

11,121 users

Finds HTML elements matching chosen CSS selector(s) or XPath expression

Screengrab by Andy M

Rated 4 out of 5 stars 575 reviews

9,635 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.

CacheViewer by benki

Rated 4 out of 5 stars 227 reviews

40,219 users

This extenion is GUI Front-end of "about:cache"...

YSlow by YSlow

Rated 3 out of 5 stars 210 reviews

28,697 users

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

SQL Inject Me by Security Compass

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Rated 4 out of 5 stars 30 reviews

5,155 users

SQL Injection vulnerabilites can cause a lot of damage to a web application. A malicious user can possibly view records, delete records, drop tables or gain access to your server. SQL Inject-Me is Firefox Extension used to test for SQL Injection vuln...

NoDoFollow by Zachary Fox

Rated 4 out of 5 stars 208 reviews

5,079 users

Just a simple extension to highlight links in a page according to nofollow / dofollow status.

RAMBack by Stuart Parmenter

Rated 3 out of 5 stars 151 reviews

12,486 users

RAMBack will cause Firefox to issue an internal notification to free up memory that is otherwise held for performance purposes. Additional items will be hooked into this notification in the future.

FirePHP by cadorn

Rated 4 out of 5 stars 58 reviews

16,200 users

Log from PHP to a devtools panel.

Clear Cache Button by Chris Holtz

Rated 3 out of 5 stars 130 reviews

7,703 users

Adds a clear cache toolbar button. After installing the extension, find the clear cache button in the toolbar customization...

CSS Usage by Teun van Eijsden

Rated 4 out of 5 stars 41 reviews

7,445 users

Firebug extension to view which CSS rules are actually used.
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