Does the job but it adds a blank Bar above the Add-on Bar Rated 4 out of 5 stars
This addon does the job pretty well but I have one issue with it.
When I start Firefox I get a blank Bar above the Add-on Bar which drive me crazy so I have to hide then show the Add-on Bar again to get raid of this annoying blank Bar. This has been for months and I thought it was a Firefox bug that will get fixed eventually but it didn't so I decided to make sure it has nothing to do with any of my installed addons. I started disabling every addon I installed then restart Firefox until this annoying blank Bar stopped showing .. that was after I disabled Firesizer. I actually did several tests before I write this review to make sure it's the reason for that.
I'm happy to give Firesizer five-stars rating once this issue has been resolved because the addon itself really does its job.
Thanks and looking forward to your reply.