I'm writing an app that opens music notation files. In my app I specify this data-entry intent-filter which allows downloaded files from the Chrome or Android browsers to open the file with my app: <data android:scheme="content" android:mimeType="*/*" android:pathPattern=".*\\.mcmidi" /> but Android Firefox does not. However if I specify just this: <data android:scheme="file" android:pathPattern=".*\\.mcmidi" /> then Firefox will open the file with my app from it's downloads screen. The problem is, if I try to use both then firefox fails, and will not open my file. In fact I can't find any combination of intent filter entries that will work for firefox and other apps. It's either firefox only and it breaks everywhere else, or everything else works and firefox doesn't. Can you tell me if this is a firefox bug, and if so is there a workaround?