Rated 5 out of 5 stars

Very useful and simple add-on indeed, but like SoftGil said, it doesn't work with the Australis interface on the first beta of Firefox 29. That's a real pity, I hope it gets updated soon!

This review is for a previous version of the add-on (initial.rev29.1-signed.1-signed). 

Thank you for the feedback. I have just uploaded an updated version that will work with Firefox 29 and above. It should be fully-reviewed soon and automatically update.