Examine source code of Clean Google News

{
  "manifest_version": 2,
  "name": "Clean Google News",
  "version": "1.0",
  "description": "Hide Google News articles containing an ad keyword. List can be configured by yourself.",
  "icons": {
    "48": "icons/clean-gnews.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/clean-gnews.png",
    "default_title": "Keywords list",
    "default_popup": "popup/keywords.html"
  },
  "options_ui": {
    "page": "popup/keywords.html",
    "browser_style": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://news.google.com/*"
      ],
      "js": [
        "popup/storage.js",
        "clean_google.js",
        "app.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6e371394-f1f0-4488-876a-1f2cd126775f}"
    }
  }
}