Interesting find. I never tested it with Firefox, but just downloaded it from the market and everything seems to work fine. I can NOT recreate the problem. Are you running the latest FireFox build? Once you use the app a little more let me know if any other apps are the same.
Troubleshooting:
Make sure you are on the latest build of Firefox
Uninstall Clutch, then reinstall
Uninstall Firefox, reinstall firefox (backup bookmarks if needed...dont know much about that app)