clipped from: mashable.com   

40+ Add-Ons for Managing Firefox Tabs

Tab Display & Placement

colorfultabs
Chromin Frame
ColorfulTabs
ColoUnREaDTabs -
FlagTab
VertTabbar

Tab Management

tab mix plus
Close Tab by Double Click
Double-Click to Reload Tabs
Duplicate Tab
Easy DragToGo
Multiple Tab Handler
NewTabURL
Next Tab
Open link in… -
OpenInWindow
Tab Buttons
Tab Clicking Options -
Tab Control
tab kit
Tab Kit
Tabs Menu
Tab Mix Plus
Tab Saver! -
Tab To Window
TabCloser
TooManyTabs

Tab Navigation

tab wheel scroll

Tab Visualization

foxtab

Miscellaneous Tools

morning-coffee