"By far the largest number of tab extensions add an item or two
to Firefox's defaults. Open Link in..., for example, simply adds
the ability to choose whether to open new links in background or
foreground tabs or windows. Another small addition is Tab History,
which allows new tabs to inherit the history of their parent tabs,
thus saving you the need to click back on the parent to retrace
"Group/Sort Tabs is slightly more ambitious. It groups tabs by
host names, or order of opening or browsing. It also lets you set a
gap between each group of tabs. It can be especially effective if
combined with one of the extensions that color-codes tabs (see
"By contrast, Informational Tab is less successful. It tries to
improve tabs by adding a progress bar for the opening of the page,
a well as a thumbnail of the page and a close button on each tab.
The progress bar and close button work reasonably well, but the
thumbnail is too small to be of use -- even if you adjust the
default, tabs are simply too small for viewable thumbnails."