Tested with: Build: Firefox for Android 43.0a1 (2015-08-20) Steps to reproduce: 1. Go to http://museumofme.intel.com/ 2. Tap "Tap here to activate plugin" 3. Go to Settings Actual results: - Menu is greyed out and unavailable - A message appears "Nightly isn't responding. Do you want to close it?" - build 19-08 is not affected
Probably related or a dup of bug 1196115
Flash is going away (bug 1381916), so there's no point in pursuing this further.