If they “hide” in a bookmark they might as well no longer exist. Of course with 4 windows and hundreds of tabs each, I end up with dupes and sometimes spend hours just culling the ones no longer needed and make no really noticeable progress. I really need to set aside a weekend and do just that, but life demands my attention. 😩

Edit - I also have 32GB of RAM running as 64GB zram and still sometimes get stuff closing because OOM when I do things like run updates while compiling a new kernel.

Game dev tutorials I’m only going to watch once.

You can, but there isn’t much of a difference in performance.