update readme

README.md

@@ -41,3 +41,41 @@ You may want to rebuild this image on your own:
 docker pull ubuntu:xenial
 docker build -t andrey01/chromium .
 ```
+
+
+## Extra Notes
+
+Good, stable vsync and HW acceleration
+
+```
+chrome://flags/
+Enable "Override software rendering list"
+```
+
+Verify
+
+```
+chrome://gpu/
+```
+
+To see whether you have the best result, you should have stable 60 FPS at following tests
+
+```
+http://ie.microsoft.com/testdrive/Performance/FishIETank/Default.html
+http://www.vsynctester.com/
+```
+
+
+You may want to disable Google's VP8 & VP9 video codecs: "MSE & WebM VP9" and "WebM VP8"
+as there is no hardware decoding for them.
+To do this, install h264ify extension from
+
+```
+https://chrome.google.com/webstore/detail/h264ify/aleakchihdccplidncghkekgioiakgal?hl=en-US
+```
+
+Check the codecs
+
+```
+https://www.youtube.com/html5
+```