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), …
Hopefully no one comes in here and tells me Firefox does shit like this as well… I just swapped back.
Firefox doesn’t have a huge number of pages like Google does. The problem is collusion between browser and websites run by the same company.