wget -O firefox.tar.bz2 "https://download.mozilla.org/?product=firefox-latest&os=linux64&lang=pt-PT"
tar xvf firefox.tar.bz2
sudo mv firefox/ /opt/
touch /usr/share/applications/firefox-quantum.desktop
cat >>/usr/share/applications/firefox-quantum.desktop<< EOF
[Desktop Entry]
Name=Firefox ''Quantum''
Comment=Web Browser
GenericName=Web Browser
X-GNOME-FullName=Firefox ''Quantum'' Web Browser
Exec=/opt/firefox/firefox %u
Terminal=false
X-MultipleArgs=false
Type=Application
Icon=/opt/firefox/browser/chrome/icons/default/default128.png
Categories=Network;WebBrowser;
MimeType=text/html;text/xml;application/xhtml+xml;application/xml;application/vnd.mozilla.xul+xml;application/rss+xml;application/rdf+xml;image/gif;image/jpeg;image/png;x-scheme-handler/http;x-scheme-handler/https;
StartupWMClass=Firefox
StartupNotify=true
EOF