Rated 3 out of 5 stars

Just try installing this extension, and then restart Firefox with more than one browser window open. If you do, you'll get a separate "Open IT" configuration window for each browser window! What's worse is that you have to complete each one separately; cancel the configurator, and it uninstalls the extension! (Who's awful idea was that?)

This review is for a previous version of the add-on (1.5). 

v1.5.1 solves the issue you reported

Thanks for reporting this problem. We had released an update (1.5.1) that solves the issue. Now, only one setup dialog is shown to the user.