No quality option on YouTube app recently I don't have any quality optiones on YouTube app and videos just can play on default quality and i though maybe the app has problem , so I updated app but that's not work.after that I search on youtube then I realize some old browsers do not support some quality , so I checked YouTube on android browser and I found out the browser don't have quality either but on the Firefox app I have quality option ... I think YouTube app maybe using default android browser option for playing videos or something like that , how can I fix this problem? 

is there a way to update default android browser or any trick or any app or any plugin to fix this?
my android is 4.2.2 , I test this advise : 


uninstall all YouTube updates and reinstalled but not work.
clear cache and data but not work
set Firefox browser as default browser but not work
try some other browsers still not work
update android flash player, not work
If you are using the YouTube app while on mobile data instead of WiFi, it often will not give you the option to change the quality. So I would suggest using the app on WiFi or only when you have high cellular reception.