Check and make sure it's the same fingerprint across multiple runs.
I installed CanvasBlocker, and one of the things it does is fake results for a handful of API calls. So while Panopticlick reports a unique fingerprint each time, it looks (to me, based on their results) like a different browser each time.
In particular, the two most specific categories they track are canvas and webgl hashes. Those are changing every time, which I believe makes them less useful as tracking information; the next-most-specific thing is a list of fonts, which is almost two orders of magnitude less specific.
I installed CanvasBlocker, and one of the things it does is fake results for a handful of API calls. So while Panopticlick reports a unique fingerprint each time, it looks (to me, based on their results) like a different browser each time.
In particular, the two most specific categories they track are canvas and webgl hashes. Those are changing every time, which I believe makes them less useful as tracking information; the next-most-specific thing is a list of fonts, which is almost two orders of magnitude less specific.