I have vim and some terminals on a tmux session, and a browser. Change some back-end code and have the server reloaded automatically or run some tests to verify

I have vim and some terminals on a tmux session, and a browser. Change some back-end code and have the server reloaded automatically or run some tests to verify the code works. Front-end there's an auto-refresh. Sometimes I try stuff directly on the debug console of the chromium browser, like CSS and JS, and once I've figured something out, I write it into the file. I wish vim could directly talk to the browser like emacs can, or lighttable, AFAIK (haven't tried those yet). But I'm stuck on vim forever because of the normal mode key bindings. Other than that I use git and for some projects Trello for colaboration.