Rated 5 out of 5 stars

Great add-on. The browser finally behaves as it should. There is a small inconvenience since update to FF 24.0. Now when I close the window with one single New tab, the "This is embarrassing" message is displayed on start up telling FF was not able to restore previous session.
@ypeels Thanks for your reply. You are right, described bug is reproducible even in Safe Mode. FF 26 will fix it, hopefully.

This review is for a previous version of the add-on (0.0.5.1-signed.1-signed). 

Thank you for your kind words! Passing the buck a bit, I'm guessing this is an upstream Firefox bug <https://bugzilla.mozilla.org/show_bug.cgi?id=853779> rearing its head... If my guess is right, you should be able to reproduce the behavior even in Safe Mode, using Ctrl+W (or Ctrl+Shift+W) instead of the middle-click. Let me know how things go!