When pressing F11 in Chrome (fullscreen browser mode), a project set to Letterbox Integer Scale (and to a scalable resolution) will fill the screen as expected.
However, when pressing F11 in Firefox, the project will fill the screen for a single frame, then revert back to a scaled-down view. Pressing F11 in IE has the same effect.
STEPS TO REPEAT
1. Open the above file
2. Run the project in Chrome, Firefox, or IE
3. Press F11 in the browser to force fullscreen
4. Chrome will scale properly, the others won't
Thanks for any help you can provide!