BUR #24438 has been approved by @nonamethanks.
rename mozilla -> mozilla_(character)
rename firefox -> mozilla_firefox
rename thunderbird -> mozilla_thunderbird
deprecate firefox
deprecate thunderbird
These two program by Mozilla lacks any qualifier, despite there are other tags with the same name. Mozilla Firefox shares the same name with a movie, and there are plothera of characters named "Thunderbird". So I think these should be qualified accordingly.
Edit: Added qualifier for Mozilla's mascot tag.