After having tested out version 3 betas for some time now, I feel confident to officially release 3.0.3.

3.0.3

[BUGFIX] Make sure only allowed prefixes are ever in use when checking for re-randomization.

3.0.2

[BUGFIX] Specifying a manual address as default now affects the interfaces that should use the default
[BUGFIX] Properly disable/enable submenus if config file cannot be found/written

[BREAKING] Daemon executable directory moved from
/Library/Application Support/LinkDaemon
to
/Library/Application Support/io.github.halo.linkdaemon
as this is more future-proof.
[USABILITY] Hide "Prefixes" submenu and reveal it only when holding the option key. I think it's only for advanced users.
[DOCUMENTATION] Updated most images
[DOCUMENTATION] Add Airpass to list of alternative apps
[DOCUMENTATION] Make the background dark
[DOCUMENTATION] Add section about prefix configuration

[BREAKING] Configuration directory moved from
/Library/Application Support/LinkLiar/
to
/Library/Application Support/io.github.halo.LinkLiar
as this is more future-proof and I think the way Apple wants it.
[FEATURE] Choose among vendors (and custom prefixes) to be used when randomizing MAC addresses #27
[FEATURE] Do not show leakage icon for ignored interfaces #38
[FEATURE] Show which MAC address was specified by default
[FEATURE] Show paths to all relevant directories and files in developer menu
[UPDATE] Update MAC prefixes of "popular" vendors