Hey!
I updated the extension for you.

You can now toggle on/off an option for *only auto grouping new tabs*.

Update the extension, and check it out!

Tell me if that answered your request :)

Also, if you liked the fix, please consider upvoting! ;)

If there's any other request feel free to update me in the requests form!

*UPDATE:

Hey again!

I fixed the pinned tabs bug.

So now if you pin tabs - grouping and auto grouping won't touch them. Pinky promise 🤞

Please check it out, and consider upvoting if you like the extension!

If not, please leave any issue/request in the support page of this extension :)