So my Firefox 155 on one of my computers suddenly refuses to load all kinds of files, among which all style sheets, citing CORS errors and whatnot. On my other computer it works fine. Turning off my usual combo of AdBlock + Ghostery solves the issue (both must be disabled for most sites) ... but can anyone please tell me what the effing eff is going on? I don't even understand enough to formulate a search query. Some technical terms would be greatly appreciated.