Extremely complex but the only working fingerprint spoofing extension out there now that the original Fingerprint Spoofing extension/add-on has been removed from Github because later reiterations are malware and developer has stopped supporting it more than 5 years ago. On Firefox, but not Chrome it ramps up CPU usage and RAM.

I had to disable this after the upgrade to Firefox 125.0.1 because it caused very high CPU (100%) and RAM (20G+) usage for multiple hours, without end. I used about:memory to discover that this was the culprit. After I disabled JShelter, the CPU usage and RAM dropped.