Najlepszy!

Thank you. Fast and helpful.

Does what it's supposed to do and nothing more. Neat.

works fine

Super useful for us, tab hoarders with 250+ tabs opened... This is kind of sad, but this extension is not to blame!. I recommend moving it from the address bar level to tabs strip and disabling it vis userChrome.css when you have non-overflown tabs!

Cool little helper. Informs me with the exact number of tabs open. THIS is what I wanted.
An improvement would be if I could define a number for alert notification. (even wording I enter :)
example: 20+ Hello, 40+ WaytoGo!, 60+ Caution!, 80+ Nuts!
I am at 108 right now, I need to come down.

Works as expected and the best tab counting add-ons I tried out

It perfectly does everything it should do.

Great light weight extension for those who multitask and have hundreds(sometimes thousands of tabs open). Still some "customizablity" I think could be improved in regards to sizing the font or perhaps changing the size. It is very functional as is however as is, and have been using it for a long time after relacing another tab counter. Thank you oriol.

thinks,I like this extension

Wonderful extension, thanks

With 16GB RAM in a pc, this AddOn allows (easy use) seeing a current count of (e.g., 800+) open FireFox Tabs, both entire count and count within current Firefox window. Along with Windows Task Manager (80+% RAM used), alerts me when to shutdown some Tabs and/or reboot Firefox, to free enough RAM to avoid crashing Firefox/Windows