Examine source code of YouTube Keyword Filter

{
  "manifest_version": 2,
  "name": "YouTube Keyword Filter",
  "description": "Most YouTube Videos have keywords. If they are allowed, all is fine. Else, blocks with a page displaying the keywords.",
  "version": "0.7.1resigned1",
  "permissions": [
    "tabs",
    "*://*.youtube.com/*",
    "storage"
  ],
  "icons": {
    "225": "ytf.png"
  },
  "background": {
    "scripts": [
      "settings.js",
      "background.js"
    ]
  },
  "storage": {
    "managed_schema": "schema.json"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@ytf"
    }
  }
}