This is another big problem for VR: The headsets are very locked down. Getting something like an Ad Blocker, sideloading apps, or general functionality hacking is too cumbersome. You burn out and go back to your laptop before long.
Sideloading on the Meta headsets is trivial. Its probably as hard to change the bootloader as it is on Android (I mean, it IS Android) but I'm not sure what you would need that for.