PUBLIC MARKS from decembre with tags solution & abuot:config

For a few days now Whatsapp web has been asking me to update my Firefox to the latest version. I have a few instances of Waterfox running and this is the only system where this issue arises. Try this: add general.useragent.override.WEBSITE [general.useragent.override.whatsapp.com (or whaterver the address is)] in about:config and set it's value to Mozilla/5.0 (Windows NT 10.0; Win64; rv:60.0) Gecko/20100101 Firefox/60.0 or some other correct user agent. Addon you used might be bad, if above doesn't work you can try uMatrix (at least to test if it will work). If that wont work either, you can try and remove cookies and other local data for that websiteThanks will try that. I am using https://addons.mozilla.org/en-US/firefox/addon/uaswitcher/ which does the trick for other sites like Spotify.