You can easily install a spring or quick disconnect, but your best option will be a shorter antenna.
I have a WILSON 5000, with both a spring, and a quick disconnect. The most important item was a clip I made to bow the antenna in a loop. This allowed clearance in parking structures.
Now I know a firestick is fiberglass. I have seen people use a spring and tie-dowm to create the clearance needed for low over-hamgs with them. Now they were mounted on a corner, and not centered, thus creating a ...HOOP...across the vehicle, rather than front to back. As was stated by a poster above, using a spring AND a quick disconnect is your best bet.
A spring whip has that little button on it which allows my home-made clip a grab point. Something I did on a fiberglass dune whip, was using a old fishing pole steel line quide with glue and thread to make attachment point on the whip similar to the original fishing pole. Make a string or thin nylon strap with a clip to use with it, if and when needed.
I hope this gives you ideas and options. Fiberglass is not as forgiving as steel, but fire sticks are one of the better antennas, and are worth exploring options with.