I want to change some of my bookmark favicons. I went online and found a few recommendations for extensions that purport to do that, but when I tried to access them, I got "This page does not exist", which I assume to mean that those extensions are obsolete. When I tried to find a solution on the support forum, I got "1900" responses. I went through about 50 of them and none had anything to do with changing favicons!

There are a couple of YouTube videos that address this problem, but I can't understand the speech of the authors, and, from what I did understand, the process advocated is complex. I assume this is a simple task. Am I wrong? Just looking for a simple list of instructions.