Examine source code of RecipeFilter

{
  "manifest_version": 2,
  "name": "Recipe Filter",
  "short_name": "Recipe Filter",
  "version": "1.0",
  "description": "Recipe Filter shows recipes found anywhere on the web in a handy popup.",
  "icons": {
    "128": "img/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "html/options.html",
    "browser_style": true
  },
  "browser_action": {
    "default_title": "Recipe Filter",
    "default_icon": "img/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "css/recipe_filter.css"
      ],
      "js": [
        "js/main.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{20057d7b-d901-414c-9d32-5cf85c6d1a05}"
    }
  }
}