How to save modified css/html code in developer mode?

Question

css

I would like to change the light style of the code editor to dark on my hosting. This, of course, is not so difficult to get around in other ways, but I also need a constant page refresh through <meta http-equiv="refresh" content="">
but, of course, after the update, the code will be restored, but I need it to be the same. Is it possible to somehow save the styles for a site in the browser? Or maybe some browser plugin?

Answer 1

There is a Stylish plugin for Chrome and Firefox
And even for other browsers

Answer 2

You need something like Greasemonkey