mckeen
Tumrgrwer
Same thing happened to me... just like in the picture. Luckily, I have the proper tools to fix it. I was able to reassemble it and place the gasket back in place. It looks better then when I got it, I don't expect it should dislodged as easily now.
On Firefly 1 the gasket was on the inside of the glass view port. Firefly 2 has it on the outside of the glass, which seems to clean much easier. Where your fasteners loose?