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If you enable 'privacy.resistFingerprinting' in your about:config, you get substantially harder to track. The caveat is that there's a small (albeit noticeable) performance delta.

That attribute is part of ongoing work and it's disabled for a reason. Currently it doesn't protect you against canvas or webgl fingerprinting.

I think you can turn webgl off or disable extensions and use the addon CanvasBlocker for that until the Tor Uplift project gets completed.

They do have tracking protection (basically a content blocker) but by default it's only enabled in private mode.

What should you rely on?

good question, I don't personally have such needs so I haven't investigated it.

EFF's Privacy Badger extension [0] should help a little, but if you really need to avoid tracking you'll need something more like Tor.

[0]https://www.eff.org/privacybadger

Torbrowser actually warns to not resize your browser as the resize allows people to fingerprint you