I have been using Vivaldi on Win7 and Linux for a while. I like that it allows showing multiple windows.
It does seem to have a problem of ‘growing’ the longer it is open. Closing tabs seems to only close them cosmetically; they seem to still be open in the background until the browser is closed.
Otherwise, I like it.
I still use Windows 7 on one computer, wired to my secured router. Do you think 7 is pretty safe even though Microsoft dropped support?