add dbus-1-glib-devel to BuildRequires (not pulled in automatically anymore on 12.1)
(transplanted from fab4bf56063770101e9543c7939d298ed7a8d9d1)
[Desktop Entry]
Encoding=UTF-8
Name=Firefox
GenericName=Web Browser
Comment=Web Browser
TryExec=firefox
Exec=firefox %u
Icon=firefox
Terminal=false
StartupNotify=true
MimeType=text/html;text/xml;application/xhtml+xml;application/vnd.mozilla.xul+xml;text/mml;application/x-xpinstall;x-scheme-handler/http;x-scheme-handler/https;x-scheme-handler/ftp;
Type=Application