Better Gmail 2

"Better Gmail - Enhance your Gmail with an useful Firefox extension."
By SoftCns Editor: Better Gmail 2 is an extension that will enahance the interface of the new Gmail using the Greasemonkey user scripts. Better Gmail basically adds a menu of optional extra features to the new version of Gmail.

Once you've installed Better Gmail 2, go to your Gmail account to see the enhancements. To turn a feature on or off, visit the extension's Preferences dialog (from the Tools menu) and select or deselect the appropriate checkboxes. Refresh Gmail to see the changes.

NOTE: Better Gmail 2 only works with the NEW Gmail.