Just don't have Google account and clean cookies and history regularly[1], forbid saving 3rd party cookies (built-in in Firefox) and noise your canvas generator [2], block 3rd party JS, CSS, media and fonts [3], control your referals your browser sends on each click [4] use VPN or Tor on startup. You don't need to bother with those tools, they will just work in background (µBlock requires some configuration).

[1] https://addons.mozilla.org/en-gb/firefox/addon/expire-histor... [2] https://addons.mozilla.org/en-gb/firefox/addon/no-canvas-fin... [3] https://addons.mozilla.org/en-gb/firefox/addon/ublock-origin... [4] https://addons.mozilla.org/en-gb/firefox/addon/refcontrol/