Add-ons

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.

QuickFolders (Tabbed Folders) by Realraven (Axel Grude), Alexander Malfait

The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.

See new mail at a glance after automatic filtering - supports quickFilters addon!

Metal Lion Sea Monkey by Frank Lion

Metal Lion meets SeaMonkey.

Pan by cstkingkey

Block ads and manage proxy.

Metal Lion Silver Sea Monkey by Frank Lion

Metal Lion meets SeaMonkey and makes it shine....

Noia Fox by David.Vincent

Theme for Firefox and Thunderbird
Based on Noia Iconpack by Carlitus (deviantART)

Noia Fox options is here (small icons, square tabs,...).

Copy As Plain Text by mehtuus

Removes formatting from copied text.

FLST (Firefox 4+) by fabianswebworld

Provides Focus Last Selected Tab and Tab flipping functionality (based on the FLST extensions by Gorgias and Gozer, but ported to Firefox 4/.../56 and repaired Tab flipping functionality). Enjoy!

Noia Fox options by David.Vincent

Options manager and fixes for Noia Fox theme 3.x.x

Element Hiding Helper for Pan by cstkingkey

Help you create element hiding rules for Pan to fight the text ads.

Cabernet.. by MaDonna

SepiaIt by DWS1985

Clean Black Strata by xxgiering22xx

Hello firefox by bouboule20