[ericra]

I've always been a bookmark guy, and I don't know how you hundreds-of-tabs guys do it. It would driv me crazy I think.

That being said, have you looked into something like this:

https://addons.mozilla.org/en-US/firefox/addon/auto-tab-disc...

(Disclaimer: have never used it, but it is a recommended extension). It may not meet your needs exactly since it would likely reload YouTube tabs when "undiscarded", but it might be worth a look.

[mircea]

I have used it, but it doesn't stop JS in background tabs, it unloads them which means that I'll have a multi-second delay when I focus the tab again. ATM I unload them manually, in bulk.

> I've always been a bookmark guy, and I don't know how you hundreds-of-tabs guys do it.

I use both. I use a modified version of TabsAside, but I also use multiple windows, one for each topic + general. The way I work, as I go through the relevant material for the current topic, I open new tabs in the background (to research later) so I don't interrupt my flow. Bookmarks are too much friction for this workflow.