About this Collection
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832 Add-ons in this Collection
YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages.
http://yslow.org is the official open source website.
ChatZilla by Gijs Kruitbosch, Robert Ginda, others
A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.
Displays tabs in tiled layouts in Firefox. Arrange tiles horizontally, vertically or in a grid. Resize tiles by dragging splitter bars. Tabs and links can be dragged to open in other tiles. Supports multiple tiled layouts. Works with tab groups.
UnPlug is an extension which lets you save video and audio which is embedded on a webpage - it's a video download tool.
Proxy Selector lets you switch local proxies in Firefox.
Add URLs of audio and video files to VLCs playlist via context menu of your browser
This allows users on Windows and Linux to print web pages to PDF. Mac users you already have this functionality.
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon
For Online HTML 5 validation, you need 0.962
F.B. Purity hides the ads, app spam and other annoying clutter from your facebook news feed, lets you increase the font size, change colours plus many more features and generally makes Facebook a lot less annoying to use.
Block sites containing pornography, or any other kind of material, based on simple keyword lists.
Font Finder by Ben Dodson, Eric Caron, others
FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.
Does your country/organization block you from facebook, youtube or others?
Is the service you want unavailable in your country?
Stealthy is the solution for you.
Unlike other extensions we do the work of look for fast proxies for you.