diff --git a/src/chrome_manifest.json b/src/chrome_manifest.json
index 33bc5ae..1b0e2c8 100644
--- a/src/chrome_manifest.json
+++ b/src/chrome_manifest.json
@@ -27,7 +27,9 @@
       ],
       "css": ["/content-script/main.css"],
       "all_frames": true,
-      "matches": ["*://*.youtube.com/*"],
+      "matches": [
+        "*://www.youtube.com/*",
+        "*://m.youtube.com/*"],
       "run_at": "document_start"
     }
   ],
@@ -51,10 +53,11 @@
     "storage"
   ],
   "host_permissions": [
-    "*://*.youtube.com/*"
+    "*://www.youtube.com/*",
+    "*://m.youtube.com/*"
   ],
   "web_accessible_resources": [{
     "resources": ["/images/rys.svg"],
-    "matches": ["*://*.youtube.com/*"]
+    "matches": ["*://www.youtube.com/*", "*://m.youtube.com/*"]
   }]
 }
diff --git a/src/firefox_manifest.json b/src/firefox_manifest.json
index d7da19e..5e266aa 100644
--- a/src/firefox_manifest.json
+++ b/src/firefox_manifest.json
@@ -30,7 +30,9 @@
       ],
       "css": ["/content-script/main.css"],
       "all_frames": true,
-      "matches": ["*://*.youtube.com/*"],
+      "matches": [
+        "*://www.youtube.com/*",
+        "*://m.youtube.com/*"],
       "run_at": "document_start"
     }
   ],
@@ -52,7 +54,8 @@
   },
   "permissions": [
     "storage",
-    "*://*.youtube.com/*"
+    "*://www.youtube.com/*",
+    "*://m.youtube.com/*"
   ],
   "web_accessible_resources": [
     "/images/rys.svg"