What I mostly use

by LionSpark

30 Add-ons in this Collection

Adblock Plus by Wladimir Palant

Rated 5 out of 5 stars 4,991 reviews

23,439,654 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).

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.

DownThemAll! by Nils Maier, Federico Parodi, others

Rated 5 out of 5 stars 1,626 reviews

1,483,902 users

The first and only download manager/accelerator built inside Firefox!

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.

NoScript Security Suite by Giorgio Maone

Rated 5 out of 5 stars 1,511 reviews

2,486,773 users

The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.

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.

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.

United States English Spellchecker by jooliaan

Rated 3 out of 5 stars 166 reviews

567,294 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)".

Spanish (Spain) Dictionary by tnarik, RickieES

Rated 4 out of 5 stars 107 reviews

339,133 users

Spanish/Spain Dictionary

Password Exporter by Justin Scott (fligtar), Jorge Villalobos

Rated 4 out of 5 stars 325 reviews

209,191 users

This extension allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 341 reviews

179,116 users

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

Download Manager Tweak by squashr1979, andman42

Rated 4 out of 5 stars 411 reviews

83,196 users

Allows the download manager to also open in a tab or sidebar, and adds some optional display changes.

FXChrome by dkgo

Rated 4 out of 5 stars 711 reviews

153,732 users

A Chrome-like theme for Firefox.

Diccionario español México by eduardo_moreno

Rated 4 out of 5 stars 76 reviews

77,259 users

Diccionario para México.

Quick Locale Switcher by ppclick

Rated 3 out of 5 stars 85 reviews

230,585 users

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.
  1. 1
  2. 2
Results 115 of 30

What are Collections?

Collections are groups of related add-ons that anyone can create and share.

Explore Collections

Recently Viewed