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.
Link Properties Plus Requires Restart
Provides extended link properties: size of linked file, last modified time, etc.
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.
DownThemAll! AntiContainer Requires Restart
Make the resources behind container pages easily downloadable by DownThemAll!
Extended Link Properties + (obsolete) Requires Restart
This application extends the Link Properties and displays File Size, Last Modified Date, Content Type and HTTP Header of a link...
Warning: developing discontinued, see least
OpenDownload² Requires Restart
OpenDownload² extends the "Save" dialog by a "Run" button to open the file directly.
Mozilla Archive Format, with MHT and Faithful Save Requires Restart
— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!
Irvine ContextMenu Requires Restart
Downloads links and images with Irvine.
Update Notifier Requires Restart
Note from Mozilla: This add-on has been discontinued. Try Add-on Update Checker instead.
Notifies you when updates are available for your extensions and themes.
InlineDisposition changes the disposition of Content-Disposition response headers from attachment to inline; this prevents servers from forcing the browser to save a file and allows that file to be viewed in the browser, if the browser supports it.
Torrent Tornado Requires Restart
smftn Requires Restart
download directly from QQ file transportation over 7/200 times limit
This add-on is intended to ease the life of the regular MEGA user.
Please note this extension is NOT the official from Mega, for the real one please go to: https://mega.nz/#firefox
MR Tech Disable XPI Install Delay Requires Restart
Disables default delay when installing...
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.
Complete YouTube Saver Requires Restart
Download YouTube videos in various formats including 1080p, 4K etc (DASH formats). Convert audio track from videos to MP3 or WAV, or save audio in native format (Ogg, AAC/M4A, MP3, OPUS). Save YouTube page, video, comments and subtitles to one folder
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.
Cookie Importer Requires Restart
Imports cookies from a textfile.
Reads Netscape standard cookies.txt files as exported by IE and others.
Very useful in combination with the Cookie Exporter add-on.
Save Images Requires Restart
Save Images saves the images from the current tab page, from the cache, to a specified location, with either the images original file name or a file name that you specify.