Adblock extension is installed with Chrome and Vivaldi, on both browsers same error occurs:
If I start the browser normaly and click on the YouTube button, all ads are blocked and it is working normaly.
But the adblock extension on YouTube is not working if a direct shortcut to YouTube is put on the desktop. Let's say all browsers are closed and when the shortcut is double clicked, the YouTube site is opening, but ads are showing. This is because the shortcut loads the YouTube site faster as the adblock extension can start.
A shortcut link look as follows:
C:\Users\Khan\AppData\Local\Vivaldi\Application\vivaldi.exe --app=https://www.youtube.com/
In this browser window I need to press F5 to refresh the page, now the adblock extension runs well.