(I'm somewhat replying to the next message but HN didn't let me reply to it)

There's conkeror that use the same renderer engine of Firefox but with emacs mentality of keybindings and customisability.

Also, I've read that some people like to rebind their ctrl+W to something else so they don't have the habit to close their windows in other os/apps. IIRC, C-w is kill-region? Personally, as stated earlier, I use evil so I don't have that problem (I press d to delete the selected region).