EDIT: my uBlock Origin was way outdated, updating fixed it, thanks @heldenstad (have now set add-ons to auto-update too)
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Just in the last couple of days, I've noticed #ublockorigin has become very aggressive, making even the rendering of Wikipedia pages horrible.
Anyone else get this? I imagine it has something to do with one of the blocklists, but don't know how to figure out which without switching each on off :/