manifest.json

{
    "manifest_version": 3,
    "name": "YouTube AdBlocker",
    "version": "2.1",
    "description": "Removes Ads on YouTube",
    "permissions": [
      "activeTab"
    ],
    "action": {
      "default_icon": "icon.png",
      "default_popup": "index.html",
      "js": ["index.js"]
    },
    "icons":
    {
        "128": "icon.png",
        "16": "icon.png",
        "48": "icon.png"
    },
    "content_scripts": [
      {
        "matches": [
            "*://youtube.com/*",
            "*://www.youtube.com/*",
            "*://m.youtube.com/*"
        ],
        "js": ["content.js"]
      }
    ]
  }