See what's going on in your tabs, with just a glance:
Tab Badge recognises numbers in page titles, like the (1) in the Gmail picture above, and produces a round badge in your tab, so you can quickly scan which tabs want your attention. It also has special-case handling of Gmail and Google Plus.
Things you can change
You can change Tab Badge options within the Add-ons Manager. Otherwise, you can go to
about:config and change these settings:
forecolor- change the colour of the badge and the text in the badge. You can specify any valid CSS colour.
whitelist- a space-separated list of domain names for controlling which sites the badge is shown for.
extensions.tabbadge.mode- set to
extensions.tabbadge.style- set to
1for the standard circle badge, or
2for the smaller, in-icon badge (see the Facebook image above).
Tab Badge is on GitHub at https://github.com/darktrojan/badge - send me a pull request!