AdBlock
BugMeNot Lite
FlashBlock
KB SSL Enforcer
LastPass
QR-Code Tag Extension
Readability Redux
Smooth Gestures
SmoothScroll
Vimium
Webpage Screenshot
Xmarks
----------
Firefox:
Adblock Plus
Add to Search Bar
Combine Buttons
Firebug
FireGestures
Flashblock
FlashVideoReplacer
Greasemonkey
Hide Menubar
HTTPS-Everywhere (Development branch)
Menu Editor
OptimizeGoogle
Organize Status Bar
QuickRestart
Screengrab
Stop-or-Reload Button
Stylish
Tab Mix Plus
Tabs on top
User Agent Switcher
Vimperator
AdBlock
BugMeNot Lite
FlashBlock
KB SSL Enforcer
LastPass
QR-Code Tag Extension
Readability Redux
Smooth Gestures
SmoothScroll
Vimium
Webpage Screenshot
Xmarks
----------
Firefox:
Adblock Plus
Add to Search Bar
Combine Buttons
Firebug
FireGestures
Flashblock
FlashVideoReplacer
Greasemonkey
Hide Menubar
HTTPS-Everywhere (Development branch)
LastPass
Menu Editor
OptimizeGoogle
Organize Status Bar
QuickRestart
Screengrab
Stop-or-Reload Button
Stylish
Tab Mix Plus
Tabs on top
User Agent Switcher
Vimperator