Firefox has effectively become spyware, and so, yes, it should be replaced. There are several forks that work well. I’m using Floorp (stupid name, but really nice with some improvements over vanilla Firefox). Zen is another one gaining in popularity. Try them out! Don’t let Mozilla walk away with your data.

Oh, it’s perfectly clear. We got the message. Mozilla are not to be trusted with our data.

He didn’t melt down. This was a performance, theater, or as he himself said: great television. It was a planned insult and betrayal of Zelensky. Putin couldn’t be more pleased.