Seems like there's a simple solution to this dilemma. Assuming build time is the single determining factor:
If the value of two hours' build time overnight is less than the value of a privacy-enabled build of Chrome, then build Ungoogled Chromium overnight.
Else, get Firefox.
Most people running macOS (as vemv at least is) run a lot of random binaries from various types of strangers – mostly proprietary applications, although there's also things like Homebrew cached binaries, 'curl | sh' installers, etc. Now, in this case downloading a binary isn't necessary, since there's the option of building it yourself. That's great, and it's definitely (somewhat) safer to build it yourself... but that doesn't make the binary less trustworthy than if that weren't an option. If building sounds like too much effort, you shouldn't automatically give up on using the program, but just fall back to your personal baseline policy for running binaries. And for a lot of people, for better or worse, I think that policy is fairly trusting.
That's wildly different from the typical CI-built binary.
Fixed[1] in rattlesnakeos-stack[2]
[1] https://www.reddit.com/r/RattlesnakeOS/comments/953dfj/v0025...
[2] "A cross platform tool that provisions all of the AWS infrastructure required to build your own privacy focused Android OS on a continuous basis with OTA updates." https://github.com/dan-v/rattlesnakeos-stack
This is the most current fdroid issue from what I can tell: https://gitlab.com/fdroid/rfp/issues/378
Edit: that's really well done - https://github.com/dan-v/rattlesnakeos-stack#how-much-does-t...
Most people's VPS won't have enough RAM to run the Android builld process.
I don't think that's the best use of everyone's time or energy. Not to mention, it may be more error prone, or even insecure depending on what your base system is like. And you'll have to track updates. It seems like chromium is problematic to build in general. Debian hasn't marked it as reproducible. It is also not clear if it is possible to build it for Android using a Foss stack. Various efforts to include chromium or derivatives in Fdroid have failed.