Best Performance Mozilla Addons Alternatives

Total performance plugins - 32
Video DownloadHelper

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

Total Downloads: 4.5M
YouTubeâ„¢ Flash-HTML5

Play YouTubeâ„¢ Videos in Flash or HTML5 Player

Total Downloads: 47.1K
Places Maintenance

Allows to run maintenance tasks on the Places database, the bookmarks and history component behind Firefox.

Total Downloads: 34.2K
Soundcloud SUPER +2: Downloader and Recommender

This Add-on allows you to download every track from Soundcloud and in addition it gives you recommendations! After installing this Add-on you will have a new Download button at every track.

Total Downloads: 8.9K
WebM Inline Player

Automatically replaces links to WebM files with embedded videos

Total Downloads: 6.7K
Simple Youtube Repeater

Simply click the repeat button to make the video automatically repeat. Works both with the newest HTML5 Player(version 2) and the old Flash Player(version 1).

Total Downloads: 2.6K

Displays a Google cached version of the web page.

Total Downloads: 1.5K
Tab Kit - Mouse Gestures

Provide some mouse gesture on tabs and other stuff

Total Downloads: 1.2K

A Tab Counter extension for the tab-addicted. Provides some stats too!

Total Downloads: 812

This addon allows you to look up any definitions for words in your own language.
Select a word in a webpage and right click mouse and choose DefineThisNow to view a pop up box with the Wiktionary definition. Wiktionary covers many languages.

Total Downloads: 367
DevTools Prototyper

This add-on adds JS Fiddle style code prototyping to Firefox DevTools.

Total Downloads: 311
Bookmark Toolbar Icons

displays bookmark toolbar icons on the Mac

Total Downloads: 275

Quick access to add-on functionality: activate / deactivate, options, details, home / review / donation pages, uninstall, restart.

Total Downloads: 241
Keyboard Shortcut

Open a webpage by pressing a keyboard shortcut, e.g. CTRL-K for your search engine webpage.

Total Downloads: 240

permet de lancer le programme d'édition des formulaires Qualios

Total Downloads: 88
Gophertool for Firefox

gophertool for Firefox inspired from Chrome gophertool extension

Total Downloads: 75
MercadoLibre Venezuela Buscador

Search for the selected text in the venezuelan auctions site Mercado Libre . Instructions: select the text you want to search, right-click and choose 'MercadoLibre Venezuela Buscador'

Total Downloads: 64
View Tab

Thumbnail Preview of Tabs on mouse-over

Total Downloads: 56
Auto Hide Sidebar

Sidebar automatically show and hide.

Total Downloads: 55

Converts the current page to a BibTeX entry

Total Downloads: 55