'''I don't know what OS you're using. ''' * On iOS you can change the icon using similar settings: https://support.mozilla.org/en-US/kb/customize-your-firefox-app-icon-ios. I believe they added the retro Firefox logo recently. * On macOS, you can follow this guide: https://www.howtogeek.com/how-to-customize-app-icons-on-macos/ * On Windows, you can follow this guide: https://www.solveyourtech.com/how-to-change-the-icon-of-an-app-in-windows-11-a-step-by-step-guide/ * On Linux, you can follow this guide: https://medium.com/@18bhavyasharma/how-to-change-the-logo-or-icon-of-any-program-in-linux-e430476c604a