@fonm I cannot get past the first line because it says command not found.

@fonm Are the first two lines supposed to be on one line?

I am running Ubuntu 20.4 and I am trying to set Opera as my default browser. I have tried to do it in the browser settings but when I click on the button, nothing happens. I also tried to set it in my settings in Ubuntu but it will also not work. Everything still opens in Chrome. Please help?