Essential tab customization tool Rated 5 out of 5 stars

Essential tab customization, control and workflow utility. One of my favorite features is to customize how tabs appear when refreshed and unread in the background. Really helps me manage the 40-80 tabs I tend to have open.

As a long time user I can say the developer is continually improving and fixing issues as Firefox spits out updates. If you use for a while, it is worth donating. Also be sure to check the dev's support forums for help. Be friendly and constructive.
http://tmp.garyr.net/forum/

NOTE: Recent changes to FFx have caused some of TMP's built-in SessionManager features to break. TMP's support team suggest using the stand-alone Session Manager by Morac:
https://addons.mozilla.org/en-US/firefox/addon/session-manager/

This review is for a previous version of the add-on (0.4.0.3.1-signed).