It seems to work across restarts from what I can tell. I just tried to verify it.
I have a tab group in Simple Tab Groups for a perl project I've been working on. The group is basically just a bunch of perl docs (metacpan, etc). I haven't touched the project or the group in a few weeks and I've in that time restarted both FF and my PC several times as well as having updated my FF install several times.
I just switched to that tab group and opened up a random cpan docs tab and it loaded it back in half way down the page. The scroll moved a little bit (only a few lines of text worth of scroll) but that was it.
Of course this doesn't work consistently for all pages. I know for a fact that social apps like bluesky don't tolerate suspends all that well and force a reload but most "vanilla" web pages like docs sites tolerate suspends quite well.
I have a tab group in Simple Tab Groups for a perl project I've been working on. The group is basically just a bunch of perl docs (metacpan, etc). I haven't touched the project or the group in a few weeks and I've in that time restarted both FF and my PC several times as well as having updated my FF install several times.
I just switched to that tab group and opened up a random cpan docs tab and it loaded it back in half way down the page. The scroll moved a little bit (only a few lines of text worth of scroll) but that was it.
Of course this doesn't work consistently for all pages. I know for a fact that social apps like bluesky don't tolerate suspends all that well and force a reload but most "vanilla" web pages like docs sites tolerate suspends quite well.