I noticed this yesterday. I've been using Mozilla/Phoenix/Firebird/Firefox as my primary browser for over 20 years. They've made some questionable calls, sure, but most of the recent things that have bothered people (like Pocket integration) haven't really irked me.

This is the first time where I got a visceral feeling that maybe this isn't the browser I knew and loved anymore. It's not like I'm uninstalling and switching to something else, but I do feel bummed out.

This is includes settings for removing or disabling all the integration with Mozilla services and their ads.

See for example: https://github.com/arkenfox/user.js