Rated 5 out of 5 stars

close similar tabs not working, seems like none of the tab menu items are working

This review is for a previous version of the add-on (1.6pre7.1-signed.1-signed). 

Fixed in 1.6pre8

The issues with "close similar tabs" and "close multiple tabs" have been fixed in 1.6pre8. However, it is still awaiting review by mozilla, so the update will not be pushed. Please visit:
https://addons.mozilla.org/en-us/firefox/addon/tab-utilities-phoenix/versions/
In order to download the latest version. If you are running Pale Moon 24, there are issues with the removal of Tab Groups functionality (please read "About this Add-on" for solution). Let me know if you're still having issues.