@oudstand Adding Functionality (JS)
There is only one single file in Vivaldi that you should ever need to modify. This file is called window.html and located at:
<YOURVIVALDIDIRECTORY>\Application<VERSION>\resources\vivaldi
You should back it up before you fiddle with it.
You did the backup, right? OK, here's the fun part:
Open window.html, and inside the <body> element add the following line:
<script src="custom.js"></script>
You can name the file as you want and also add multiple ones, one line at a time.
Add the custom.js file to the Vivaldi folder (alongside window.html)
-- and you're all set!
I followed these steps in the first link you sent me, It did not work.
I tried to folllow the steps in the 2nd link
but I don't understand because this is quite vague
Place this script in the folder which contains the *.js files to install.
Edit the installPath variable to point to your Vivaldi application.
Double‐click the file to install modifications.
i've followed the first two steps but, what should I do with the script? in what format should I save it so I can double click it!?