Add-ons

DownThemAll! by Nils Maier, Federico Parodi, others

The first and only download manager/accelerator built inside Firefox!

Saved Password Editor by Daniel Dawson

Adds the ability to create and edit entries in the password manager.

Collector's Note Disabled: enabled only when needed

SQLite Manager by lazierthanthou

Manage any SQLite database on your computer.

Collector's Note Disabled as for 2017-02

Password Exporter by Justin Scott (fligtar), Jorge Villalobos

This add-on allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Note: This add-on won't work in Firefox 57. It may eventually if the APIs to access passwords are implemented.

Collector's Note Disabled: I'm a bit scared to have it enabled all the time.

Element Hiding Helper for Adblock Plus by Felix Dahlke

Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.

Collector's Note Disabled: in favor of uBlock

Live HTTP Headers by Daniel Savard, Nikolas Co

View HTTP headers of a page and while browsing.

Collector's Note Removed actually. Don't remember when and why.

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.

Collector's Note Why isn't it built-in still?

Silvermel by ShareBird

A Creamy Silvery Experience

Collector's Note Disabled

VKontakte.ru Downloader (music/videos/photos @ VK) by Sergey Kolosov

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.

Collector's Note Disabled: I have a separate profile for VK now.

RefControl by James Abbatiello

Control what gets sent as the HTTP Referer on a per-site basis.

about:addons-memory by Nils Maier

Adds an about:addons-memory page that details add-on memory usage

Collector's Note Disabled as for 2017-02

View Dependencies by Florian QUEZE

View Dependencies adds a tab to the Page Info window, in which it lists all the files which were loaded to show the current page.

Collector's Note Disabled as for 2017-02

wmlbrowser by Matthew Wilson

Simulate WAP browsing by viewing WML (Wireless Markup Language) pages.

Collector's Note Removed: no such websites remain on the net.

Hide Menubar by yuoo2k

Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.

Collector's Note Disabled: deprecated by "Hide Caption Titlebar Plus" Remember to show the menu before trying to customize Firefox' interface.

FxIF by Christian Eyrich, Ted Mielczarek

View EXIF data in image properties