Review for TB Header Tools Extension by Eric Moore
Rated 4 out of 5 stars
http://forum.addonsmirror.net/index.php?showtopic=1906 has a modified version of the add-on that supports 3.*, plus another 3.* version that includes a bug fix. Scroll down to the bottom of the web page to find them, the version at the top only supports 2.*See http://kb.mozillazine.org/Updating_add-ons for how to either bump the version number or bypass the version checking. If you do that it works with 3.1.6
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