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 Tor Browser was released and includes a temporary fix for a known WebGL fingerprinting technique. The developers have stated that this is a quick fix and a better approach needs to be developed to deal with the fingerprinting potential WebGL comes with. The full changelog since the release is: “We need a more holistic approach”””
Source: https://www.bleepingcomputer.com/news/software/tor-browser-851-released-with-webgl-fingerprinting-fix/