You don't need to go all the way, but the very least I would advise turning on the resist-fingerprinting config in Firefox. At a minimum, block things like canvas/webGL. You're making yourself more identifiable by doing so, but the alternative is worse.
Now, if you're not using a VPN, and you're in a rural area, and you're on Linux/Firefox with Javascript disabled -- sure, I definitely buy that I could do some pretty decent correlation with that info. That's why VPNs (for all their flaws) still matter.
> Faking the common fingerprinting vectors known to expose you uniquely is possibly a better way...
I wish there was more research being done around this. I appreciate what Firefox is doing, and I assume there are good reasons for their fingerprinting strategies. They know more than me about this stuff. But... it still sets off some alarm bells in my head. It seems like it would be strictly better to spoof location/canvas/microphone data instead of only blocking it.
Disabling javascript is like wearing a ski mask in a crowded mall.
It makes you much more obvious and easier to track, but harder to identify on the outset.
However, IP is certainly used. I know of a few cases where IP is at least used as a filter. Most websites won't see that many users from one IP address.