There will be no version 77 release.

• The WPF/OffScreen versions are largely unusable with no workaround (graphical rendering issues)
  • https://bitbucket.org/chromiumembedded/cef/issues/2733/viz-osr-might-be-causing-some-graphic
  • https://bitbucket.org/chromiumembedded/cef/issues/2483/osr-invalidate-does-not-generate-frame
  • See also WPF - blank display and resize glitches/tearing #2925
• There's a crash using MultiThreadedMessageLoop (the CefSharp default) when shutting down, there's no workaround anymore (no longer possible to disable the Network Service).
  • https://bitbucket.org/chromiumembedded/cef/issues/2703/crash-when-closing-if

With the release of Chromium version 78, CEF will deprecate the 3865 branch, so these bugs won't be fixed. There are already version 78 builds appearing on http://opensource.spotify.com/cefbuilds/index.html