Bugzilla

This affects Youtube as well:

**Steps to reproduce**

 1. Orient the tablet in landscape mode
 2. Load https://www.youtube.com/watch?v=6Y8FVIiWyao
 3. Request desktop site
 4. Tap the button at the bottom right of the video to enter fullscreen mode
 5. Try to tap the same button again to exit fullscreen mode

**Expected results**

The video exits fullscreen mode.

**Actual results**

The video plays or pauses.

Unlike on Rotten Tomatoes, double-tapping the video to exit full screen mode does not work as a workaround. Rotating the table to portrait mode does not seem to work either (the page remains in landscape orientation even after the rotation).

I have found some other workarounds for getting out of fullscreen mode but they are less discoverable:
 * Turn the tablet's display off and back on (which shows the lock screen) and unlock it. This causes Firefox to leave fullscreen mode.
 * With the table physically oriented in portrait mode, activate the application switcher. This seems to force Firefox to change oritentation to portrait mode.

This affects Youtube as well:

**Steps to reproduce**

 1. Orient the tablet in landscape mode
 2. Load https://www.youtube.com/watch?v=6Y8FVIiWyao
 3. Request desktop site
 4. Tap the button at the bottom right of the video to enter fullscreen mode
 5. Try to tap the same button again to exit fullscreen mode

**Expected results**

The video exits fullscreen mode.

**Actual results**

The video plays or pauses.

Unlike on Rotten Tomatoes, double-tapping the video to exit full screen mode does not work as a workaround. Rotating the table to portrait mode does not seem to work either (the page remains in landscape orientation even after the rotation).

I have found some other workarounds for getting out of fullscreen mode but they are less discoverable:
 * Turn the tablet's display off and back on (which shows the lock screen) and unlock it. This causes Firefox to leave fullscreen mode.
 * With the table physically oriented in portrait mode, activate the application switcher. This seems to force Firefox to change orientation to portrait mode.