diff --git a/Content.js b/Content.js
index ea39c2a..bc5a7e7 100644
--- a/Content.js
+++ b/Content.js
@@ -1,13 +1,24 @@
-let blackSquare = "https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSU8u8tpVE9yl1Jj0L81O7deRDfyW-yOXX-Kw&s"
+// Toggle class name for all tags of specified type
+const toggleClass = (className, tag="img") => {
+  console.log("Everyday I'm toggling...")
+  const tags = document.getElementsByTagName(tag)
+  for (tag of tags) {
+      tag.classList.toggle(className)
+  }
+}
+
+// Default settings go here
+const setDefault = () => {
+  toggleClass("blackout")
+}
 
+
+// Add default settings classes
 const observer = new MutationObserver(() => {
-  const images = document.getElementsByTagName("img");
-  for (let img of images) {
-    img.src = blackSquare;
-  }
-});
+  setDefault()
+})
 
 observer.observe(document.body, {
   childList: true,
   subtree: true
-});
+})
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index 78ae1ea..4107430 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,10 +3,16 @@
     "name": "DarkScroll",
     "version": "1.0.0",
     "description": "Removes YouTube video thumbnails to reduce scrolling temptation.",
+    "permissions": ["tabs", "scripting"],
+    "host_permissions": ["https://www.youtube.com/*"],
+    "action": {
+        "default_popup": "popup.html"
+      },
     "content_scripts": [
         {
-            "matches": ["https://www.youtube.com/"],
-            "js": ["Content.js"]
+            "matches": ["https://www.youtube.com/*"],
+            "js": ["Content.js"],
+            "css": ["darkscroll.css"]
         }
     ]
 }