Just found the firmware tag (x38), where questions mostly refer to either rom (x78) or custom-rom (x141).
Suggestion:
- remove the firmware from those questions already tagged custom-rom
- merge firmware into rom
- make firmware a synonym to rom
Though there's one more thing to consider: firmware may be ambiguous, as it could as well refer to radio-firmware (x6). How do we deal with ambiguous tags in general, and especially in this case?
EDIT: as per suggestion from GAThrawn (to check What's the intended purpose of the 'radio' tag?What's the intended purpose of the 'radio' tag?), those questions relating to radio-firmware and radio-firmware itself could be merged into cellular-radio in this process.