I feel like it’s really far from being open. Besides the training data not being open, the more popular ones like llama and stable diffusion have these weird source available licenses with anti-competitive clauses, user count limits, or arbitrary morality clauses.

UBlock Origin will block content within Firefox, and do a better job at it than AdAway. AdAway tries to block ads on the whole phone, including embeded ads in a lot of apps. But unless you root your phone, you can’t run AdAway and a VPN at the same time.

It can also happen with apps from the main repo. If the app is reproducible (about 5% so far, most new apps) then F-Droid will use the developer signature.