Shows absolutely wrong number of tabs! I have 23 tabs opened and your extension shows 92!
Removing it.

Works fine w/ my browser theme. I like that it shows number in this window + number of all windows. thanks.

Needs update to support new Firefox black tab bar

Thanks for this practical add-on. I just miss the option to change text color. I like light colors but in that case number of open tabs is invisible (because it is always white). And also like someone before mentions it would be useful that you could change size of font (number) for us who don't have perfect vision any more :)

Firts of all very good addon,
I would like to know if it is possible to have an option to increase the size of the number of pages. the current size for me is a bit small (vision problems) and if it was configurable it would suit everyone, including those who see less well: D
Regards.

It can use a better look but it does what it needs to do.

Can you please add support for https://addons.mozilla.org/ru/firefox/addon/tab-groups-panorama/ to show tab counter for current group only? Thanks for addon!

Pretty much does what it promises to do. It counts your tabs.

Works nice on Firefox 57 :)

Installation does not ask for any permissions, great!
The displayed number looks like sore thumb, too much attention grabbing, I had to change the background color in settings of the extension.

It's about 66KB in size (packed), being the biggest contender (the smallest I've tested is 6.5KB, packed). It uses a timeout to update the badge, what I'm not sure is the best way of doing it (I've seen others using event triggers). It may be configured to show total tabs in all windows, tabs in each window or both (although that last option is not very useful, as there is a limit of how many characters can be displayed on a badge). Nevertheless, it has good options and works fine, using WebExtensions technology and is bootstrapped (no restart required).

Simple to use, easy to configure, good performance even with hundreds of tabs, good code quality. Thanks for this great extension!

Very good replacement for unmaintained tab-counters add-ons. Better than old ones.

I opened 41 tabs in one window and one tab in another window. Total 42 ... look at how they are counted in the attached picture:
https://ibb.co/iXiH4a

Decent replacement for https://addons.mozilla.org/en-US/firefox/addon/tab-counter/ that works with multiprocess, but the icon and box around the number is distracting. Please add an option to have it display as a number in the same font as Firefox and nothing more.

The icon doesn't clearly communicate the purpose of the addon to me, but that doesn't really matter. Maybe it would be fine if the icon looked more like a tab and less like a line with bends in it.
There is an option to set the addon's icon to transparent and just leave the little thing that says how many tabs there are. It's nice that there is a little popup when you click on the addon icon that tells you how many tabs you have open in the current window and how many you have total.

If I change colour for black, Tab Counter is always in red.

You're welcome. I use Firefox 52.0 x86 and Cyberfox 52.0 x86 (Intel).