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===Youtube Google Monopoly: we'll stop supporting this browser soon===The string is general.useragent.override.youtube.com the value (on Linux) that used to work is Mozilla/5.0 (X11; Linux x86_64; rv:42.0) Gecko/20100101 Firefox/42.0 PaleMoon/28.8.0This is the early 2020 solution:The previous user agent override is not good enough anymore. Use this instead: 'about:config' Mozilla/5.0 (Windows NT 6.1; WOW64; rv:62.0) Gecko/20100101 Firefox/62.0