diff --git a/Platform-specific-differences.md b/Platform-specific-differences.md
deleted file mode 100644
index b98639b..0000000
--- a/Platform-specific-differences.md
+++ /dev/null
@@ -1,21 +0,0 @@
-[work in progress]
-
-#### Websockets
-
-##### Chromium
-
-Currently **can not** be blocked.
-
-Outstanding [Chromium issue 129353](https://code.google.com/p/chromium/issues/detail?id=129353).
-
-##### Firefox
-
-Requests for connection upgrade to websocket **can** be blocked.
-
-Connection upgrade requests are currently reported into the `other` column.
-
-**TO DO:** uMatrix should specifically check for requests for connection upgrade to websocket, and report this in the logger (just like it currently does for `ping` requests).
-
-##### Test cases
-
-- [Ephemeral Hosting](http://ephemeralp2p.durazo.us/2bbbf21959178ef2f935e90fc60e5b6e368d27514fe305ca7dcecc32c0134838) (might not last forever)
\ No newline at end of file