PlatinumArtificer wrote...
It seems the problem wasn't Fakku.
I tested on Chrome and couldn't get the problem to happen. Safari refuses to load subscription chapters in a Private window, so I didn't investigate any further.
Then I tested again on Firefox with extensions disabled, and the CPU problem didn't happen. Reenabled extensions and the problem came back.
Just now I noticed one of my extensions (Tree Style Tab) had a new update available, and updated. Now I'm not seeing the problem anymore. Apparently it was some kind of a bug in the extension, not Fakku. Sorry for wasting your time.
No problem, great to hear that the problem sorted itself out.
As a general recommendation to anyone having issues in this thread: If you use browser extensions, try disabling them and see if your issues persist - if not, then try enabling things one at a time to figure out which one is causing the issue.