manifest.json

{
    "manifest_version": 2,
    "name": "Thanks, Clippy",
    "version": "0.1",
    "permissions": ["tabs", "<all_urls>"],  
    "content_scripts": [
      {
        "matches": [
          "<all_urls>"
        ],
        "js": [
          "assets/js/jquery.min.js", 
          "assets/js/clippy.js"
        ],
        "run_at": "document_start",
        "css": ["assets/css/style.css"],
        "pages": ["assets/clippy.html", "assets/incognito.html"]
      },
      {
        "matches": [
          "<all_urls>"
        ],
        "exclude_matches": [
          "https://www.youtube.com/",
          "https://www.facebook.com/"
        ],
        "js": ["scripts/follow.js"]
      },
      {
        "matches": [
          "https://web.whatsapp.com/"
        ],
        "js": ["scripts/whatsapp.js"]
      },
      {
        "matches": [
          "https://www.reddit.com/"
        ],
        "js": ["scripts/reddit.js"]
      },
      {
        "matches": [
          "https://www.youtube.com/"
        ],
        "js": ["scripts/youtube.js"]
      },
      {
        "matches": [
          "https://www.facebook.com/"
        ],
        "js": ["scripts/facebook.js"]
      }
    ],
    "background": {
      "scripts": ["assets/js/background.js"]
    },
    "web_accessible_resources": ["assets/*", "scripts/*"]
}