I have 2,748 open tabs. The icon should say "2.7k" Instead it says "274". This is not configurable, as there are no preferences.

If all you want is to display the tab count, it will deliver. I had a little bit of a hard time making out the text on the badge but hovering over it, I could read the tooltip/pop-out text easily enough.

This addon does not have a Preferences section so if you were hoping to customize background/foreground colors or increase the font size, better look elsewhere. For those use-cases, you might try: 'Tab Count Icon by lllusion3418', 'Tab Counter (Tilwa fork) by tqdv', or 'Tab Counter (fork) by vhfmag'

This addon consumes enormous amounts of memory when you close multiple tabs.
When I decided to close a group of 40 tabs, this addon consumed extra 3 GB of memory, and this memory was freed only after a minute. If you attempt to close a group with more tabs, it can just consume all your available memory and crash the browser.

EXCELLENT

Thank You so much It does what it says !

Please make the name of the extension 'Open Tab Count'.

It's a nice complement to Tab Tally,
https://addons.mozilla.org/addon/tab-tally/

I do have Status-4-Evar (mentioned by previous reviewers) but it's not necessary for version 3.1 of Open Tab Count.