It turns out Google Chrome (via Chromium) includes a default extension which makes extra services available to code running on the `*.google.com` domains - tweeted about today [by Luca Casonato](https://twitter.com/lcasdev/status/1810696257137959018), …
Just asked in their matrix channel.
hybridstaticanimate:discord There is nothing to patch. hybridstaticanimate:discord Other browsers chose to enable this.