Apparently it's an A/B test thing. I was a lucky winner. All I did was update (Ubuntu 20.04.2 LTS) To confirm I disabled all plugins immediately to ensure it w

Apparently it's an A/B test thing. I was a lucky winner. All I did was update (Ubuntu 20.04.2 LTS) To confirm I disabled all plugins immediately to ensure it was bog standard Firefox (which is why I was so irritated at the time, proper threw off my day). Bonus it had the Amazon tracking code "admpdesktopuk-21", which if you do a search reveals a bunch of plugins that went rogue. E: apologies I can't track down the source where I saw it was an ab test