Killer Extensions ++

by Phil D.

63 Add-ons in this Collection

Video DownloadHelper by mig

Rated 4 out of 5 stars 6,468 reviews

4,598,282 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 984 reviews

1,330,719 users

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

iMacros for Firefox by Ipswitch

Rated 4 out of 5 stars 394 reviews

416,003 users

Automate Firefox. Record and replay repetitive tasks. If you're tired of manually visiting the same sites, filling out forms, downloading files and extracting data, then iMacros is for you! Save time, effort and money with iMacros browser automation!

FlashGot Mass Downloader by Giorgio Maone

Rated 5 out of 5 stars 531 reviews

876,108 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 262 reviews

358,497 users

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

BlockSite by Wips.com s.r.o.

Rated 3 out of 5 stars 529 reviews

206,948 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.

Tab Mix Plus by onemen, Gary Reyes

Rated 4 out of 5 stars 2,589 reviews

878,545 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 949 reviews

521,057 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!

Element Hiding Helper for Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 449 reviews

682,084 users

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

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

Rated 5 out of 5 stars 451 reviews

296,153 users

FireShot makes full web page screenshots. Demo: http://bit.ly/RlBQMV

Screenshots can be quickly captured and:

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

* OS Windows only

Flashblock by Philip Chee

Rated 4 out of 5 stars 1,209 reviews

623,324 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...

IE Tab V2 (Enhanced IE Tab) by ietab.net

Rated 4 out of 5 stars 431 reviews

567,229 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.

Personas Plus by Mozilla

Rated 3 out of 5 stars 966 reviews

325,072 users

Personas (now known as lightweight themes) 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 themes.

Xmarks Sync by Xmarks Inc.

Rated 4 out of 5 stars 2,557 reviews

350,249 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!

Session Manager by Michael Kraft

Rated 5 out of 5 stars 460 reviews

297,493 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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