Simple tab counter you can drag and drop anywhere on menu bar and customize the color scheme too. Does what I wanted it to do.

Works great! But how can I add the badge to the titlebar as in your screenshots (FF62)?

Now I don't have to COUNT how many tabs I have open but just with a look can see that I have 31 tabs open and I should go through them and close some. Thanks! :) What I like about this one more than the others is that it is by the tabs so doesn't make the spot with the other addons longer.

Am I wrong or are in version 0.4.0 no possibilities to configure it? I do not see any settings options. I am using Firefox 62.0.3. Currently it shows only the open tabs separate for each window, no window count together with tabs count like in your first image. I only see the correct counts when moving over the icon or clicking on it. Will be the full featured version only available for Firefox 63? Add info: I updated Tab counter from last version to 0.4.0.

** Update 16.10.2018 **
got update for 0.4.1. Noticed still missing option of add-on in Firefox 62.0.3 Add-On Manager view. Removed the add-on and reinstalled it and, voila, the options of the add-on are back. I do not know what happened that the view of options in the add-on manager view has been dismissed, but anyway.. now full 5 stars for my needs. Thx for your work

No permission asked = 11/10 or an easy 6 star

Once installed I got scared when i saw that i have more than 350 tabs open, but i was not really surprised... ;)

It does just one thing (total number of tabs), but it does it smoothly and well.
Simple and effective! well implemented with the FireFox UI without disturbing your eyes.
Strongly recommended to those who need to scroll horizontally to switch between tabs...

Thanks a lot to the developer/Perry

me gusta, ayuda a llevar control para quienes abrimos muchas pestañas. muy muy buena.

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

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.

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 :)

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.

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).