This category is not in use because it has an ambiguous title.
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- For the beetles commonly called fireflies, see Category:Lampyridae.
- For the sailboat type, see Category:Firefly (dinghy).
- For the film series, see Category:Firefly (film series).
- For the media franchise, see Category:Firefly (franchise).
- For the television series, see Category:Firefly (TV series).