Thank you for your post.
Currently, I do not have a Mac OS X 10.8.5 computer available to me. However, I did test this with both FileMaker Pro Advanced 13.0v9 and FileMaker Pro Advanced 12.0v5 under Mac OS X 10.10.5, and I was unable to make it crash. I used both Google maps and Google.com clicking on "Maps".
Let me know if you are able to replicate on more recent releases of Mac OS X.