diff --git a/README.md b/README.md
index dc7e9c9..44c7be7 100644
--- a/README.md
+++ b/README.md
@@ -14,3 +14,18 @@ I have decided to add here a list of the Firefox's extensions I am using
 https://www.eff.org/privacybadger
 https://adblockplus.org/
 ```
+
+Extra
+=====
+
+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://addons.mozilla.org/en-us/firefox/addon/h264ify/
+```
+
+Check the codecs
+```
+https://www.youtube.com/html5
+```