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Download the latest firefox-*.tar.bz2 Quantum or Developer edition archive.
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Make the file executable.
$ chmod +x install_ff.py
- Run the script to install Firefox Quantum like this.
$ sudo ./install_ff.py --file firefox-83.0.tar.bz2
... or install Firefox Developer Edition with the --dev flag.
$ sudo ./install_ff.py --file firefox-84.0b5.tar.bz2 --dev
- Create a desktop shortcut that points to /opt/firefox-quantum/firefox
...or /opt/firefox-developer-edition/firefox.