This site eats about 50% CPU on Firefox (on an older laptop) for every page that is open at the same time, and it continues to eat 50% after closing all pages. It doesn't use JavaScript and no visible CSS animations, so what is it? Apparently, the favicon! Which, as explained on the linked page, "is SVG, (with S.M.I.L. animation)". Since the favicon is still listed on the list of favourites on the browser start page, it continues to eat CPU... until clearing the browser history.
- On edge on linux (yes) cpu process usage increase as well, but not as much.
- On chromium cpu usage do not evolve but it is not animating the favicon.
If you want to disable it on firefox and are using ublock origin, you can do so by going to the ublock origin dashboard --> My Filters and add the following line:
