The Tor Project has released Tor Browser 8.5.1 and it is now available for Windows, Mac, Linux, and Android. This release is the first bug fix since 8.5 was released and also includes a temporary fix for a known WebGL fingerprinting technique.

While this release is mostly bug fixes, the developers did disable WebGL readPixel() function, which can be used to fingerprint a Tor Browser user. One of the project contributors named gk left the following comment in the bug report related to this issue.

The developers have stated that this is a quick fix and a better approach needs to be developed.

"Additionally, we disable the WebGL readPixel() fingerprinting vector, realizing, though, that we need a more holistic approach when trying to deal with the fingerprinting potential WebGL comes with."

Tor 8.5.1 can be downloaded from the Tor Browser download page and from the distribution directory.

The full changelog since Tor Browser 8.5.1 is: