FileRun allows you to replace the default favicon with your own, and your custom files will be preserved between software updates.
Place your favicon files inside the folder customizables/images/favicons.
The system will look for the following filenames:
192.png — 192×192 PNG icon512.png — 512×512 PNG icon256.svg — 256×256 SVG iconIf a file with one of these names is present, FileRun will automatically use it in place of the default favicon.