Add-ons

DownThemAll! by Nils Maier, Federico Parodi, others

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

Collector's Note Downloader. (Disabled)

User Agent Switcher by chrispederick

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Collector's Note Switch user agent. (Disabled)

QuickNote by Leszek Życzkowski, Jed Brown, others

A simple note-taking extension.

Collector's Note Notes in sidebar.

Session Manager by Michael Kraft

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.

Collector's Note Saves sessions. (Not installed)

NoRedirect by Kai Liu

NoRedirect lets the user take control of HTTP redirects. It can be used to interdict an ISP's DNS search redirection hijacks, preview/screen "shortened" URLs (e.g., TinyURL), stop the annoying redirection of "smart" error pages, etc.

Collector's Note Author has other useful compatible add-ons. (Not installed)

Speed Dial by Josep del Rio

Direct access to your most visited websites

Collector's Note (Not installed, replaced by Speed Start)

Download Status Bar by Szalgiris

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.

Collector's Note Enhanced downloading.

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!

Collector's Note Save webpages. (Disabled)

Disable Add-on Compatibility Checks by Kris Maglione

Reinstates the extensions.checkCompatibility preference without respect to the current application version.

Collector's Note Use previously "incompatible" add-ons! (Not installed)

GNotifier by mkiol

Add-on for Thunderbird that replaces the built-in notifications with OS native ones. It supports most Linux Desktop Environments as well as Windows 8.1/10.

Collector's Note Windows notifications instead of SeaMonkey's. (Not installed)

Image Zoom by Jason Adams

Adds zoom and rotation functionality for images...

Collector's Note Zoom for images.

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.

Private Tab by Infocatcher

Adds private tabs.

Collector's Note Private tabbed browsing.

RequestPolicy Continued by Martin Kimmerle

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

Collector's Note (Disabled)

AutoProxy-ng by hrimfaxi

This is a fork of AutoProxy, which can run the latest version of Firefox.