Really well executed extension. This thing stays out of the way but lets me know how things are going. On browser restart if you have 70 to 700 tabs it takes a while to catch up and there is some update lag when you delete tabs to clean up but that is most likely not a problem with this extension (more like a problem of having too many tabs open :-)).
I have a list of 7 extensions I always install and this is number 3!

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.

It is ok, colors can be customized, what it shows, number of tabs, number of windows, etc, also can be customized. But nowhere I can choose the place, it always sits in the tab bar, I can drag it in the addon bar with the customzation firefox menu, but impossible to put it next to the URL bar.

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

Counter says "wait" all the time for seemingly no reason, especially considering it flickers with the value for such an insignificant time.

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

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.