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FlashGot Mass Downloader Requires Restart
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.
Download Status Bar
If you are the kind of person who likes to have total control over every aspect of your downloads, "Download Status Bar" is the add-on you are looking for.
AutoSave Plus for ScrapBook Plus / XSidebar Requires Restart
AutoSave is an Add-On to the firefox extension ScrapBook Plus by haselnuss and ScrapBook with XSidebar for SeaMonkey. This is a modified version of the original Add-On. Uninstall the original AutoSave before you use this extension.
OpenDownload² Requires Restart
OpenDownload² extends the "Save" dialog by a "Run" button to open the file directly.
Preserve Download Modification Timestamp Requires Restart
Preserve the modification timestamp, sent by the server, for downloaded files
RSE Tools Requires Restart
Tools for working with rapidshare and links from other popular file hosting and sharing services.
Features: get rapidshare links from a page, test selected rapidshare links, search rapidshare files for selected terms, etc.
Stop Tube HTML5
Stops autoplay of YouTube HTML5 videos (WebM). It is Flash-Block equivalent for HTML5 videos.
VKontakte.ru Downloader (music/videos/photos @ VK) Requires Restart
Download music, videos and photos from VK.com / vkontakte.ru. One-click download, natural filenames, displaying file size and bitrate for music, downloading HD video, downloading HQ photos. No spam, no usage of your account, no spyware.
POW -- Plain Old Webserver Requires Restart
Turn the web on its head with the Plain Old Webserver (POW), which adds a server to your browser.
Download Timestamp Requires Restart
Sets downloaded file's modification time to current time in Firefox 4.0 and SeaMonkey 2.1.
Minimeter Requires Restart
Monitor your provider's upload/download usage meter.
Not maintained anymore, looking for a developer, contact me if you're interested.
SabnzbdFox Requires Restart
Ease nzb files downloading by catching all downloads and redirecting them to your download tool : sabnzbd or any other newsgrabber which wait for files in a directory.
MR Tech Disable XPI Install Delay Requires Restart
Disables default delay when installing...
Youtube Downloader Gold
This extension to download audio and video from popular video hosting YouTube. To download the available formats mp4, webm, mp4a, mp3.
Hide Clear List Button Requires Restart
Hide the "Clear List" Button in the Download Manager.
Facebook Chat Download
Create a simple html page containing the whole chat. The page will contain only the chat section. All other page elements will be removed. Once the addons ends loading the chat you can save the clean page from your browser.
To create your own collections, you must have a Mozilla Add-ons account.