I was looking for some kind of documentation on what API's and scripts does the TOR browser blocks (mainly as a defense for fingerprinting). I have come across the Design and Implementation document of the Tor Browser but was confused whether the list of API's mentioned in the document are all of the API's that get blocked.

1 Answer 1


Tor doesn't block APIs (this is virtually impossible and probably not what you want to do), Tor blocks web pages which addresses match a given check on a blacklist or entire types of content like JavaScript, iframes and fonts. There is no list as such.

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