Add-ons

NetVideoHunter by netvideohunter

This add-on is a downloader that lets you easily download videos from sites like Youtube, Facebook, Metacafe, Dailymotion, Break, VKontakte and music for example from SoundCloud, Grooveshark and from many other sites...

Collector's Note Video downloader. Installable on SeaMonkey.

UnMHT by arai_a

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Mozilla Archive Format, with MHT and Faithful Save by Christopher Ottley, Paolo Amadini

— 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!

StartupMaster by htamas

Asks for the master password at startup (fixes multiple password prompt)

ProfileSwitcher by Paolo "Kaosmos"

It adds some options to launch easily other profiles and the Profile Manager.

Thumbnail Zoom Plus by David Adler

Shows full image when you hover over a thumbnail. Works with Amazon, Baidu Images, Bing Images, Facebook, Flickr, Google+, Google Images, IMDb, LinkedIn, Netflix, Pinterest, Reddit, Twitter, Yandex, YouTube, Wikipedia, Yahoo Images, & many more.

Save Images by Lumox

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.

Complete YouTube Saver by cg-addons

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

Copy Plain Text 2 by Leszek Życzkowski

Copies text without formatting

Collector's Note Copies text as plain text.

Right Links by Infocatcher

This extension allows to open links in new tabs with right-click directly and using “long” left-click.
This is very useful for touchpads on notebooks and for mice without middle button.

OpenDownload² by Tuxman

OpenDownload² extends the "Save" dialog by a "Run" button to open the file directly.

Bamboo Feed Reader by Julien Fray

Feed reader | RSS - ATOM - OPML

This extension has NOT been rewritten with the new WebExtensions API (Firefox Quantum).
No future version is planned by the original developer.

Bamboo is still running with Palemoon.

about:addons-memory 2016 by L0garithmic

Adds a new page that shows add-on memory usage

Tab Wheel Scroll by Matt H

Switch tabs by scrolling with the mouse wheel in the tab bar.

Collector's Note Switch tabs by scrolling with the mouse wheel.

FxIF by Christian Eyrich, Ted Mielczarek

View EXIF data in image properties

Collector's Note Examine photo data.