I tried Sidebery for a couple of months off the back of multiple recommendations and while it has some decent features, I found it surprisingly lacking in terms of basic features like "close multiple tabs". I also found it regularly would semi-regularly prevent me from clicking on tabs which was frustrating until I restarted the extension or Firefox.
In the end I found good old Tree Style Tabs was better. I just wish it had an easier UX for creating named tab groups.
I use Sidebery a lot and I'd like to know what exactly you mean by "close multiple tabs"? I currently drag with right click in Sidebery and then click close tabs in the popup menu, however I don't really like doing this way. How is it done in Tree Style Tabs?
On latest Android, long-pressing home activates the Google Assistant overlay, which allows you to select any text on screen (and translate and search region).
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In the end I found good old Tree Style Tabs was better. I just wish it had an easier UX for creating named tab groups.