Oh me too-first saw it as support to Carry on Henry in the early 70 s, and was lucky enough to get a copy from Network DVD before it was deleted.
Never knew it appeared in the cinema .
It was a TV Movie and although ITC did make tv movies with the intention of releasing to cinemas in other countries I never heard of them in cinemas in the UK before.
It did actually get released on video in the early 80's by Precision Video but for some reason it never got a sell through retail video release.
Having viewed Mr Jerico on dvd I have to say the dvd of The Firechasers is rather disappointing picture quality in comparison although its miles better than the VHS to dvd copy I made from the tape a few years back