Google Maps REALLY does not like Firefox or anyone trying to block Canvas or JavaScript tracking …
Firefox
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I agree, Maps became almost unusable once I activated canvas blocking. This is likely the culprit, OP
once I activated canvas blocking.
are you using it via an extension or something else?
I use the CanvasBlocker extension in conjunction with Firefox's internal privacy.resistFingerprinting flag, which also restricts canvas access I believe
For me, this has been the case for years, at least on Windows and Linux. It happens mostly on Maps, but also on Docs/Sheets, and to a lesser extent on GMail.
I use Firefox, but I have never had the same experience with it as those who claim it's just as fast as Chrome.
Try messing with the hardware acceleration options in the advanced settings. I can't say I've seen any stuttering using just Intel integrated graphics or on my laptop with Intel + Nvidia quadro. If your using Linux there's a good chance it's a Nvidia driver issue. You could open the developer tools side by side with Firefox and Chrome and go to the network or performance tabs and compare side by side.