I think either Kiwiflare or some Javascript makes Firefox's heap explode.
I can't reproduce now but when Firefox was eating 20GB of RAM, 18GB of that was one kiwifarms tab and most of the RAM was allocated to "heap-unclassified".
I will continue to monitor. But so far everytime it used more than a few hundred MB while loading and scrolling the GC kicked in and it went down to under 100MB.
Really strange. I had to kill the process to keep using the system it was swapping so horribly.
EDIT: It didn't explode this time (only used 2.5GB of RAM) but when this page
https://kiwifarms.net/threads/femal...an-elementary-school-killing-6.159226/page-42 was open in a background tab the resources on it (comic background image, avatars) started to vanish and when scrolling the page was cut off. After a few seconds it cleared itself up and displayed normally again. While it was weird this was the memory diagnostic and CPU usage was 100%:
This does not seem to happen on other pages. Very weird. I don't think it's Kiwiflare at all. No Kiwiflare code was running. Must be some other memory leak or a Firefox bug.
EDIT2: Blocking all JavaScript on that page fixes it. Maybe it's the Chat. That's the only difference I can see on that thread.
EDIT3: It's definitely the chat. Blocking chat.js also fixes it. FF seems to load a few hundred avatars at once via the img tags and completely chokes on it sometimes.