System: OpenSUSE-tumbleweed. Was using Firefox for many months. Icon on desktop disappeared. Can get to and use Firefox by selecting the icon from the Application Menu, and it works OK. However, if I drag the Firefox icon onto the desktop and then select it, I get a message "Unknown error code 100. You are not authorized to execute this file." And the advice to make a bug report, which is what this is. Please respond to dmcgarrett@optonline.net mailto:dmcgarrett@optonline.net . Thank you.