The album was a comeback for TNT who split up in 1992 after the release of Realized Fantasies. It also marked a significant change in TNT's sound and is still heavily debated among the fans of the band. The music is more heavy and modern, reflecting the changes in the music business in the first half of the 1990s. It is also Tony Harnell's favorite album. New singer Tony Mills was told by Le Tekrø in 2007 to not even bother listening to it as they would not play anything from the album live.

The album was not as successful as some of TNT's previous albums, but still achieved some success in Norway and Japan. The band toured those countries in support of the album.

The song "Soldier of the Light" was never meant for the album. It was a demo from the Realized Fantasies sessions and was put on Firefly because the Japanese record company liked it so much.

They opened their live shows with "Only the Thief" as an intro before launching into "Somebody Told You" with Tony Harnell doing the first lines of the songs lyrics before Le Tekrø opened with the song's riff.

Rumour has it that the vocals for "Heaven's Gone" is "off beat" or not in "tempo" with the song as they had originally planned it.

"Angels Ride" has previously been reported as Tony Harnell's favorite TNT song, or one of them..

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Wikipedia