opera64-dev-56.0.3051.0-alt1.x86_64	freedesktop-desktop	warn	desktop-file-validate utility exited abnormally with the following message(s): /usr/share/applications/opera-developer.desktop: error: file contains key "TargetEnvironment" in group "Desktop Action NewWindow", but keys extending the format should start with "X-"; /usr/share/applications/opera-developer.desktop: error: file contains key "TargetEnvironment" in group "Desktop Action NewPrivateWindow", but keys extending the format should start with "X-";