Using these sort of downstream patch set browsers is rarely a good idea. If it has multiple full-time developers from a respected org dedicated to it, then it can be justifiable (Tor Browser, Brave), but take a look at the gaps in time for these two pages:

https://github.com/ungoogled-software/ungoogled-chromium/rel...

https://metadata.ftp-master.debian.org/changelogs//main/c/ch...

There's often days you're going without security patches. If you want a browser without Google tracking, Firefox is a much better choice.

I don't understand why someone hasn't just setup an automated build system that patches out google/previously-unseen URLs in each new chromium release, and posts builds. That's all you really need to disable telemetry, surely?