User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0 Build ID: 20150917150946 Firefox for Android Steps to reproduce: 1. Open the "Share tab" sync feature while browsing in Firefox. 2. Switch to the application switcher (where all running apps are listed)  3. Go to another app listed there. 4. Again go to the application switcher and choose "Add to Firefox" which is separate from the real Firefox app. Device: Galaxy S4, Android 5.0.1 Actual results:  You'll see the "Add to Firefox" as a single application.  The sync devices list is in front of the other (not Firefox) app. You can even get it to display this list on the home screen. In the screenshot this is shown in front of Threema (https://threema.ch/). Expected results: Switch back to Firefox.