NotNews!

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "NotNews!",
  "description": "Indicates when you're on a website that's been flagged as a questionable news source, or about to go to one from your Facebook feed.",
  "version": "1.3",
  "background": {
    "scripts": [
      "sitewarning.js",
      "blacklist.js",
      "bg/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "css": [
        "css/hint.min.css",
        "inject/inject.css"
      ],
      "js": [
        "js/jquery/jquery.min.js",
        "inject/inject.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": "notnews.png",
    "default_title": "Make questionable news more obvious"
  },
  "permissions": [
    "tabs",
    "https://ajax.googleapis.com/"
  ]
}