Debian

Granting user root
- su -
- adduser username sudo
- Restart computer may be needed, not just log out
Settings
- Mouse & Touchpad
  - Touchpad
    - Clicking
      - Secondary Click: Corner Push
Firefox: https://support.mozilla.org/en-US/kb/install-firefox-linux#w_install-firefox-deb-package-for-debian-based-and-ubuntu-based-distributions-recommended