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).
The Web Developer extension adds various web developer tools to the browser.
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
Debug Flash/SWF files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Access assets with the Explorer. View AMF calls and Shared Objects and much much more...
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.
Quickly test out your web pages in Internet Explorer, Chrome, Safari, or Opera. Open With opens the current page in your other browsers with just one click. Add Open With to your menus, toolbars and developer toolbox today!
The SEO Toolbar shows PageRank, Alexa, Popularity Index, Compete & SEMRush Rank for any website you visit - all on the one toolbar. Other SEO features include Search Engine view, server header view, Wayback Machine button and handy website links.
Change the colors of web sites. With the move of some sliders, you change the foreground and background colors of a site.
Watch the video for a short introduction.
Returns the 'Properties' menu item that was removed in Firefox 3.6 to the context menu.
This extension intend for web-masters and shows the image attributes, if you move cursor under it.
di.slik.es Facebook Dislike Button allows you to mark unliked content within Facebook, so that others can see what you don't like.
Collections are groups of related add-ons that anyone can create and share.Explore Collections