I use firefox mobile and it has very strange behavior quite often. It's the only browser I would ever use because of the ad block. But sometimes tabs become bla

I use firefox mobile and it has very strange behavior quite often. It's the only browser I would ever use because of the ad block. But sometimes tabs become blacked out and you can't refresh them, you have to close them and start new ones. And sometimes I have two different (consecutive?) youtube tabs, and the second tab basically fuses with the first tab, to where both tabs show the same content and the same video. I wonder if in both of these cases a tab process was killed. It's pretty common