oxygen-gtk3: Oxygen widget theme for GTK3-based applications Details: USN-2936-1 fixed vulnerabilities in Firefox. The update caused Firefox to crash on startup with the Oxygen GTK theme due to a pre-existing bug in the Oxygen-GTK3 theme engine. This update fixes the problem. We apologize for the inconvenience. Original advisory USN-2936-1 caused Firefox to crash on startup with the Oxygen GTK theme