Examine source code of Repibox

{
  "manifest_version": 2,
  "name": "Repibox - Recipe Viewer Extension",
  "short_name": "Repibox",
  "description": "Automatically find recipes on cluttered sites. Repibox puts the recipe in a nifty popup at the top of the page.",
  "version": "0.0.38",
  "icons": {
    "128": "img/icon-128.png"
  },
  "permissions": [
    "*://*.larecipe.com/*",
    "*://*.repibox.com/*",
    "*://repibox.com/*"
  ],
  "browser_action": {
    "default_title": "Repibox",
    "default_icon": "img/disabled-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end",
      "css": [
        "css/cleanslate.css",
        "css/main.css"
      ],
      "js": [
        "js/lib/jquery-3.1.0.min.js",
        "js/lib/jquery.microdata.js",
        "js/lib/jquery.microdata.json.js",
        "js/lib/jsHashes-1.07-hashes.js",
        "js/lib/clipboard-2.0.6.min.js",
        "js/lib/lz-string.min.js",
        "js/lib/jquery.qrcode.min.js",
        "js/global.js",
        "js/global-fg.js",
        "js/helpers.js",
        "js/models/RecipeSection.js",
        "js/models/KeyNodes.js",
        "js/models/Recipe.js",
        "js/send2device.js",
        "js/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/global.js",
      "js/background.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "fonts/*.ttf",
    "img/*",
    "css/main.css",
    "options.html",
    "html/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "48.0"
    }
  }
}