How to set an icon for a JS bookmark on the browser panel?

Question

JavaScript

There is a common "drag to bookmarks bar" link button that does not follow the link, but executes some JS, for example:
javascript:alert(1);
How to force the browser to use the site's favicon when adding it to the bookmarks bar?

Answer 1

Most likely not.

Answer 2

javascript:alert('%20test%20');

Answer 3

"How to set an icon for a JS bookmark on the browser panel?" - using any of the existing extensions for this .
"How do I force the browser to use the site's favicon when adding a bookmarklet to the bookmarks bar?" - either with the help of the same extension, or with the help of not quite adequate coding .