gvfs-mime --set x-scheme-handler/http chromium-browser.desktop gvfs-mime --set x-scheme-handler/https chromium-browser.desktop gvfs-mime --set x-scheme-handler/http firefox.desktop gvfs-mime --set x-scheme-handler/https firefox.desktop gvfs-mime --set x-scheme-handler/http opera.desktop gvfs-mime --set x-scheme-handler/https opera.desktop