Server Not Found Firefox can’t connect to the server at ridomovies.su. ( when I download ridomovies.su on iphone the site work

This keeps popping up on my website when I'm trying to watch movies or TV: Server Not Found. Firefox can’t connect to the server it's happening when I press any movie sites or TV shows, I've even gone to the settings and done no proxy and it's still not working, can you tell me how watch movies and TV's because this gets popping up Server Not Found. Firefox can’t connect to the server I am not a tech person says simple jargon will be, appreciated thank you.