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Cooliris by The Cooliris Team
The Cooliris 3D Wall -- Simply the fastest and most stunning way to browse photos and videos from the Web or your desktop. Effortlessly scroll an infinite "3D Wall" of your content from Facebook, Google Images, YouTube, Flickr, and ...
Video DownloadHelper by mig
The easy way to download and convert Web videos from hundreds of YouTube-like sites. This works also for audio and picture galleries.
FireShot by susbox
FireShot is a Firefox extension that creates screenshots of web pages (entirely or just visible part). Unlike other extensions, this plugin provides a set of editing and annotation tools, which let users quickly modify web captures and ...
WOT by Against Intuition
WOT, Web of Trust, warns you about risky websites that try to scam visitors, deliver malware or send spam. Protect your computer against online threats by using WOT as your front-line layer of protection when browsing or searching in unfamiliar ...
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Web Developer's Toolbox by Mozilla
Speed up the development process by using add-ons to troubleshoot, edit, and debug web projects without ever clicking away from Firefox.
Lifehacker's Must-Have Extensions by Lifehacker.Addons
Ten broadly useful extensions, as detailed at: http://bit.ly/10Xxc (There are technically 10, but Gears can't be installed from Mozilla's site)
Reference Desk by Mozilla
Make the librarian jealous with add-ons that help students, researchers or anyone with a tough question find and document all the answers.
Better Pack by Lifehacker.Addons
Lifehacker's "Better" add-ons, compiling multiple Greasemonkey tweaks for YouTube, Reader, Gmail, Google Calendar, Flickr, and other sites.
Firebug Add-ons by Jeff Balogh
Add-ons that extend Firebug. From http://www.webresourcesdepot.com/13-must-have-add-ons-to-strengthen-firebug/. Unfortunately, not all the add-ons are hosted on ...
