I already made a similar request about half a year ago (see: Merge firmware and rom?). As several other tag/retag/synonym requests, this is still open and unprocessed (i.e. neither rejected nor completed). Maybe the reason is that it's still not clear which way we should go -- but for that it doesn't help to ignore it completely.
Drawing conclusions from the discussion there, let me renew my request for work-to-be-done at that place, but put it in a little different way. We should:
- Rename the firmware tag to 'device-firmware' and (optionally) make 'firmware' a synonym (as we already have radio-firmware, this would be consequent; here the "radio" tag was simply dropped). Also, as Flow wrote: In the past, if we had an ambiguous tag we specialized the name(s). This step should be performed for sure.
- Optionally, again think about merging the whole thing with the rom, as already confirmed by Flow in his comment to the answer there: device-firmware == rom (interpreting SaintWacko's comment following that one: "firmware != rom" as it's not clear what firmware is meant -- which is clear with our reference to "device-firmware" as opposed to "radio-firmware").
- if not performing that "optional step 2", we should consider renaming 'rom' to 'stock-rom' (as opposed to custom-rom), for the same reasons given for #1 (specializing names). Again, 'rom' could be made a synonym or, as in the case of 'radio-firmware', simply be "dropped" (yes, there was a "radio" tag once).