by Shumaher

40 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,993 reviews

22,221,930 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 1,800 reviews

2,555,891 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...

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 964 reviews

1,310,746 users

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

Element Hiding Helper for Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 452 reviews

790,279 users

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

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 252 reviews

415,751 users

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

Tab Mix Plus by onemen, Gary Reyes

Rated 4 out of 5 stars 2,551 reviews

965,095 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.

Flashblock by Philip Chee

Rated 4 out of 5 stars 1,181 reviews

750,953 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...

Web Developer by chrispederick

Rated 5 out of 5 stars 218 reviews

599,415 users

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

United States English Spellchecker by jooliaan

Rated 3 out of 5 stars 166 reviews

537,654 users

United States English Spellchecker for Firefox, Thunderbird and SeaMonkey by Kevin Atkinson and Geoff Kuenning.

To enable, right-click in a multi-line text box, select "Languages", then "English (United States)".

ColorfulTabs by Shivanand Sharma

Rated 4 out of 5 stars 995 reviews

229,900 users

The most beautiful yet the simplest add-on that makes a strong colorful appeal. Colors every tab in a different color and makes them easy to distinguish while beautifying the overall appearance of the interface. For Seamonkey & Flock. An essential. F...

IE Tab by PCMan, yuoo2k

Rated 4 out of 5 stars 1,194 reviews

263,502 users

IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...

Live HTTP Headers by Daniel Savard, Nikolas Co

Rated 4 out of 5 stars 159 reviews

182,071 users

View HTTP headers of a page and while browsing.

Fast Dial by telega

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Rated 3 out of 5 stars 2,464 reviews

150,204 users

Visual bookmarks for Firefox. (Works with all latest versions of Firefox)

Fast Video Download by Applian Technologies

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Rated 3 out of 5 stars 282 reviews

66,522 users

Quickly and easily download video files from popular sites like YouTube, Dailymotion,, etc. For a more powerful free video recorder, install Freecorder at

UnMHT by arai_a

Rated 5 out of 5 stars 221 reviews

92,680 users

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
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