Rated 5 out of 5 stars

per Goetz M. RITTER el feb. 2, 2012 · enllaç permanent

Great idea, good job!
Of course I'd prefer this number to appear in the headline of the windows, together with 'Firefox' - but this is probably a place, where an add-on can't manipulate, ;-).
Thanks a lot Kai for this little but marvellous add-on!
Best regards from Germany/palatina