kkapsner

No further context given... so I have to close this issue. If you provide the missing information I can reopen it.

It works if you whitelist the Canvas API (they use the webGL readPixels function - not sure why this breaks so hard)... There are some things you could do: 1....

I do not get that message (I just entered random numbers - so I go `No record of this tracking number can be found at this time, please check the...

@spodermenpls: thanks for the feedback. Let's see what the author says.

This is a bad one... not sure if I can do anything about that. The underlying window object seems to get deleted and the recreated: 

.contentWindow is already protected and the protection works if the timeout is called earlier: ```JS var frame = document.createElement('iframe'); document.body.appendChild(frame); var ref = frame.contentWindow; document.body.removeChild(frame); [0, 1, 10, 100, 1000].forEach(function(timeout){...

I have not looked into this. But up to now Firefox does not support [window.requestFileSystem](https://developer.mozilla.org/en-US/docs/Web/API/Window/requestFileSystem) which would be required to perform the fingerprinting. So nothing to do for CB here....

OK - looking at these parts of the API I can imagine it retrieving not obvious information. Not yet quite sure if this is useful information. I would guess the...

Just for cross referencing: #681

In MDN the API is marked as deprecated and I think it will not be implemented in Firefox. So nothing to do for CB.