Unfortunately, as a tab hoarder myself, I had to remove Tree Style Tabs when I figured out it was the single reason Firefox was taking about 1 second after clicking to do actions like open a new tab or switch tab, and generally higher than ideal CPU usage. When I disabled it, everything got so much faster, it was like getting a new browser.
So I switched to Sidebery, which seemed much faster at first and I still have it enabled sometimes. But after a while and many tests to be sure, I found Sidebery was the single reason Firefox was taking an extra 10GB or more RAM. Just today, I opened about ten Hacker News tabs for an afternoon's read, and the RAM usage crept up from 18GB to 28GB. These are text-only sites as you know, and like most people I didn't read the articles only the HN comments :-) So that's a lot of unexplained RAM. I disabled Sidebery in that window and the memory usage crept back down to 18GB. (If I launch Telegam in a Firefox window with Sidebery enabled it goes up to 67GB then crashes as my SSD is too full for that much swap!). If Sidebery is disabled all along, the memory usage doesn't creep up like that.
These are figures reported by iStat Menus on macOS on my laptop. The swapping induced by the higher RAM usage caused scrolling to be extremely janky, as well as editing in forms and text boxes.
So unfortunately for me, to have a reasonable browsing experience, I found I can't use either of the good tab-sidebar extensions Tree Style Tabs or Sidebery with Firefox at the moment, each for a different reason.
I haven't seen other people reporting these issues, and each one took me a while to recognise. Therefore I asume these issues are related in some way to the total numbe of tabs and/or windows I have and that most people aren't affected (enough to matter), or those affected haven't found the cause.
There are some tab group extensions, but I found Simple Tab Groups lost hundreds of my tabs several times, with no indication that it had lost them (they just weren't there when I went to find them later), so I stopped using it.
So I switched to Sidebery, which seemed much faster at first and I still have it enabled sometimes. But after a while and many tests to be sure, I found Sidebery was the single reason Firefox was taking an extra 10GB or more RAM. Just today, I opened about ten Hacker News tabs for an afternoon's read, and the RAM usage crept up from 18GB to 28GB. These are text-only sites as you know, and like most people I didn't read the articles only the HN comments :-) So that's a lot of unexplained RAM. I disabled Sidebery in that window and the memory usage crept back down to 18GB. (If I launch Telegam in a Firefox window with Sidebery enabled it goes up to 67GB then crashes as my SSD is too full for that much swap!). If Sidebery is disabled all along, the memory usage doesn't creep up like that.
These are figures reported by iStat Menus on macOS on my laptop. The swapping induced by the higher RAM usage caused scrolling to be extremely janky, as well as editing in forms and text boxes.
So unfortunately for me, to have a reasonable browsing experience, I found I can't use either of the good tab-sidebar extensions Tree Style Tabs or Sidebery with Firefox at the moment, each for a different reason.
I haven't seen other people reporting these issues, and each one took me a while to recognise. Therefore I asume these issues are related in some way to the total numbe of tabs and/or windows I have and that most people aren't affected (enough to matter), or those affected haven't found the cause.
There are some tab group extensions, but I found Simple Tab Groups lost hundreds of my tabs several times, with no indication that it had lost them (they just weren't there when I went to find them later), so I stopped using it.