Chrome Version       : 67.0.3396.87
URLs (if applicable) : youtube.com
Other browsers tested: internet explorer (worse)
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari: NOT TESTED (lack of mac computer)
    Firefox: FAIL (60.0.2)
       Edge: FAIL (11.48.17134.0)

What steps will reproduce the problem?
(1) plug a mouse with back and forth buttons
(2) play any video on full screen
(3) click any button (back or forth)

What is the expected result?
maintain the full screen browser and keep functioning stable

What happens instead?
1.-On chrome youtube stops working, the only way to make it work again is to press esc or exit full screen.
2.-On Internet explorer is very bad, it just stay on the video but it starts to play it and stop it simultaneously and then, crash and back to the last page you were. 
3.- on firefox is a different thing it almost work, you can scroll on the section tabs and it works if you click on any of them, also if you want to put another video it works, BUT you cant scroll on the videos section, it just wont work till you get out of full screen


In additio, I havent tested any other page taht allows full screen.
At the end, it makes a bad web browsing experience when trying to lay down and relax while web browsing

Please provide any additional information below. Attach a screenshot if
possible.
screenshot 50 is chrome
screenshot 51 is firefox
screenshot 52 is internet explorer

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.




Thank you if you read this :)
 

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