I downloaded the march firmware update. now, the notifications bar disappears in 3rd party apps like firefox. how do we get it back?

I downloaded the march firmware update. now, the notifications bar disappears in 3rd party apps like firefox. how do we get it back?

Have you tried
(Long press on application icon) > ‘Apps Optimize Setting’ > (Check) ‘Run in Fullscreen’?
I have not tried the March update yet, but this is the usual way in the Onyx firmware.