The extension works as advertised.
The problem for me is that as soon as you click some link and the URL changes Tab Auto Refresh will turn off as it actually works per absolute URL and not per tab. There is no way to customised the URL and/or create some regex or wildcard for the URL like http://domain.com/path* or http://*.domain.com.
This behavior is explained on the extension description but it's a pity the author doesn't address this shortcoming. I'm more than happy to give a 5-star rating if the author makes these changes.
Tab Reloader extension (https://addons.mozilla.org/en-US/firefox/addon/tab-reloader) always reloads the tab whether the URL changes or not.