Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...
FoxClocks shows times around the world - or just your local time - at the bottom of your browser. It deals with daylight saving time so you don't have to.
A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)
Quick popup allowing you to view a calendar or pick a date. ...
Fission combines address bar and progress bar (Safari style). This makes the progress bar more visible and allows for a nice visual effect.
This extension will enable you to organize your status bar icons. You can now rearrange or remove any item (icon or text) in the Firefox status bar. If your status bar is full and cluttered like mine was, give this a try.
This extension allows you to show/hide the main menu. It can be accessed through a toolbarbutton, keyboard shortcut and popup-menu-item. It also supports autohide. the statusbar can optionally be hidden.