How do I run my scripts every time page loads instead of pasting them to the console after refreshing/loading page?
There's no way to keep a script from developer tools to be running all the time. All you do in the developer tools console, is shown only on your side. It does not affect the original website. Logically, if you could change some website and implement your own scripts, only by using the developer tools console, that would make it that every website could be breached / hacked as you please. So yea, short and simple answer, there's no way to keep a script / code you typed in the developer tools console, to run even after you close the window.