Could anyone lend a digital hand?

I dont know what im doing!

Hey everybody- I've had ubuntu for a couple yeats (18.4.06), but now i cant stream anything! Neither forefox or chrome will let me use hulu, disney, tubi, or max. So- it looks like i might need a newer os because what i have isnt supprted, but im not very computer saavy. I just want something that doesnt have to update and change all the dang time, bells and whistles dont really matter too much. Do i get a whole new OS? Will i have to back up everything i have and then put it back? Any help would ne greatly appreciated, thanks!