Examine source code of Consumer Reports Add On

{
  "short_name": "Consumer Reports",
  "name": "Consumer Reports",
  "description": "See CR product ratings and recommendations",
  "manifest_version": 2,
  "icons": {
    "16": "icons/toolbar-icon-loggedin.png",
    "36": "icons/toolbar-icon-loggedin.png",
    "48": "icons/toolbar-icon-loggedin.png",
    "128": "icons/toolbar-icon-loggedin.png"
  },
  "permissions": [
    "https://*.consumerreports.org/*",
    "background",
    "cookies",
    "storage"
  ],
  "incognito": "spanning",
  "background": {
    "scripts": [
      "static/js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.consumerreports.org/*",
        "*://*.amazon.com/*",
        "*://*.google.com/*",
        "*://*.bestbuy.com/*",
        "*://*.homedepot.com/*",
        "*://*.lowes.com/*",
        "*://*.yahoo.com/*",
        "*://duckduckgo.com/*",
        "*://*.walmart.com/*",
        "*://*.target.com/*"
      ],
      "js": [
        "static/js/content.js"
      ],
      "css": [
        "static/css/content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "static/fonts/*",
    "static/img/*"
  ],
  "browser_action": {
    "default_icon": "icons/toolbar-icon-loggedin.png",
    "default_popup": "index.html",
    "default_title": "Consumer Reports Browser Add-On"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ray.hendricks@consumer.org",
      "strict_min_version": "55.0"
    }
  },
  "version": "2.0.2"
}