diff --git a/README.md b/README.md
index c2c9633..5fe9cde 100644
--- a/README.md
+++ b/README.md
@@ -20,12 +20,14 @@ when you're listening to music on various streaming websites.
    * Bugs Music
    * Castbox.fm
    * Chrome Built-In Player
+   * Cirrus Retro
    * Comcast/Xfinity
    * Coursera
    * Crunchyroll
    * Deezer
    * Digitally Imported (di.fm)
    * Gaana.com
+   * gamemusic.multimedia.cx
    * Google Play Music
    * Groove Music
    * HearThis.at
diff --git a/extension/keysocket-cirrusretro.js b/extension/keysocket-cirrusretro.js
new file mode 100644
index 0000000..7781d25
--- /dev/null
+++ b/extension/keysocket-cirrusretro.js
@@ -0,0 +1,9 @@
+keySocket.init(
+    "cirrusretro",
+    {
+        "play-pause": "[title=\"Play/pause\"]",
+        "prev": "[title=\"Previous track\"]",
+        "next": "[title=\"Next track\"]"
+        // stop is omitted
+    }
+);
diff --git a/extension/keysocket-gamemusicmultimediacx.js b/extension/keysocket-gamemusicmultimediacx.js
new file mode 100644
index 0000000..09d769f
--- /dev/null
+++ b/extension/keysocket-gamemusicmultimediacx.js
@@ -0,0 +1,9 @@
+keySocket.init(
+    "gamemusicmultimediacx",
+    {
+        "play-pause": ".btn-group :nth-child(2)",
+        "prev": ".btn-group :nth-child(1)",
+        "next": ".btn-group :nth-child(3)"
+        // stop is omitted
+    }
+);
diff --git a/extension/manifest.json b/extension/manifest.json
index 4002ffb..74979fe 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -374,6 +374,14 @@
     {
       "matches": ["*://www.jamendo.com/*"],
       "js": ["plugin-api.js", "keysocket-jamendo.js"]
+    },
+    {
+      "matches": ["*://cirrusretro.com/listen/*"],
+      "js": ["plugin-api.js", "keysocket-cirrusretro.js"]
+    },
+    {
+      "matches": ["*://gamemusic.multimedia.cx/listen/*"],
+      "js": ["plugin-api.js", "keysocket-gamemusicmultimediacx.js"]
     }
   ]
 }