It took me a couple of days to work out that Firefox was 'broken' because I'd forgotten to install this.

"Click the toolbar button to go to the site that first referred you to the current site." Great for tab-crazy types.

"Back IS Close replaces the "Back" button with a "Close" button when the "Back" button is disabled because there is no page to go "back" to."

Firefox extension that lets you view open tabs as thumbnails. Better than Foxposé?

Tab Preview is an extension for Firefox 1.5 that shows a preview of tab contents when you move your mouse over a background tab. It's simple to use, but surprisingly useful.

The tab sidebar extension, if you haven't heard of it already, provides a sidebar in the browser that can act as a replacement to the main tab bar, with extras. The most obvious extra is that each tab includes a preview of the web page that is continually

Nice tabs with js, css, clean markup.