Earlier quoted context omitted.
> Firefox using your IP address ... to show you an ad Why do you imply that Firefox showing ads is acceptable ?
They have been doing for at least a decade by now (e.g Amazon). So why imply it suddenly isn’t acceptable to show ads (in any form)?
Because it isn't acceptable.
The first thing I've done (for years now) when configuring Firefox is to turn off many of the defaults. Advertisements, pocket, search engine, online spell checker, translator, blah blah blah.