https://www.mozilla.org/pt-BR/firefox/all/
# echo -e '[Desktop Entry]\n Encoding=UTF-8\n Name=Mozilla Firefox\n Comment=Navegador Web\n Exec=/opt/firefox/firefox\n Icon=/opt/firefox/browser/chrome/icons/default/default128.png\n Type=Application\n Categories=Network' | tee /usr/share/applications/firefox.desktop
# chmod +x /usr/share/applications/firefox.desktop
$ cp /usr/share/applications/firefox.desktop ~/Desktop
* Executar o lançador na area de trabalho