Killer Extensions ++

by Phil D.

64 Add-ons in this Collection

Video DownloadHelper by mig

Rated 4 out of 5 stars 5,680 reviews

4,809,537 users

The easy way to download and convert Web videos from hundreds of YouTube-like sites.

Greasemonkey by Anthony Lieuallen, Aaron Boodman, others

Rated 4 out of 5 stars 958 reviews

1,261,584 users

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

FlashGot Mass Downloader by Giorgio Maone

Rated 5 out of 5 stars 498 reviews

943,654 users

Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.

iMacros for Firefox by iMacros

Rated 4 out of 5 stars 382 reviews

436,229 users

Automate Firefox. Record and replay repetitious work. If you love the Firefox web browser, but are tired of repetitive tasks like visiting the same sites every days, filling out forms, and remembering passwords, then iMacros for Firefox is the soluti...

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 251 reviews

366,626 users

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

Element Hiding Helper for Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 449 reviews

757,834 users

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

Tab Mix Plus by onemen, Gary Reyes

Rated 4 out of 5 stars 2,544 reviews

913,179 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 1,168 reviews

732,207 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 305 reviews

296,008 users

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

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 934 reviews

555,195 users

FireFTP is a free, secure, cross-platform FTP/SFTP client for Mozilla Firefox which provides easy and intuitive access to FTP/SFTP servers.

Check out my new project, FireSSH!

Full Web Page Screenshots (♥♥♥♥♥) by susbox

Rated 5 out of 5 stars 437 reviews

266,926 users

FireShot makes full web page screenshots. Demo:

Screenshots can be quickly captured and:

― Saved as Image or PDF
― Sent to clipboard
― Printed
― Annotated *
― Uploaded *
― E-Mailed *

* OS Windows only

BlockSite by s.r.o.

Rated 3 out of 5 stars 508 reviews

213,595 users

BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.

Xmarks Sync by Xmarks Inc.

Rated 4 out of 5 stars 2,516 reviews

314,905 users

Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!

IE Tab V2 (Enhanced IE Tab) by

Rated 4 out of 5 stars 417 reviews

556,071 users

Note: If you are encountering the Connecting... problem see instructions below.

The updated, fully supported IE Tab. Embed IE in a Firefox tab. IE Tab Features: FF 4+ support, IE 7-9 compatibility modes, old IE Tab settings import.

Session Manager by Michael Kraft

Rated 4 out of 5 stars 567 reviews

283,953 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.
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