Killer Extensions ++

by Phil D.

64 Add-ons in this Collection

Video DownloadHelper by mig

Rated 4 out of 5 stars 5,864 reviews

5,217,131 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 964 reviews

1,363,522 users

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

iMacros for Firefox by iMacros

Rated 4 out of 5 stars 381 reviews

405,031 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...

FlashGot Mass Downloader by Giorgio Maone

Rated 5 out of 5 stars 504 reviews

1,020,939 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.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 251 reviews

403,723 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 452 reviews

825,562 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 2,549 reviews

994,552 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.

FireFTP by Mime Čuvalo

Rated 4 out of 5 stars 935 reviews

634,532 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!

Flashblock by Philip Chee

Rated 4 out of 5 stars 1,179 reviews

794,672 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...

Personas Plus by Mozilla

Rated 3 out of 5 stars 956 reviews

402,829 users

Personas are free, easy-to-install "skins" for Firefox. Personas Plus extends that built-in functionality to give you even more control and easier access to new, popular, and your own favorite Personas.

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

Rated 5 out of 5 stars 440 reviews

314,239 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 512 reviews

235,150 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 2,527 reviews

342,300 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 418 reviews

672,688 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.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 306 reviews

339,959 users

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