Examine source code of Gift Hero

{
  "name": "Gift Hero",
  "author": "Gift Hero, Inc.",
  "homepage_url": "https://gifthero.com",
  "options_page": "options.html",
  "background": {
    "page": "background.html",
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "20": "Icon-20.png",
      "40": "Icon-40.png",
      "128": "Icon-128.png"
    },
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.gifthero.dev/*",
        "*://*.gifthero.com/*"
      ],
      "js": [
        "gifthero.bundle.js"
      ]
    }
  ],
  "icons": {
    "16": "Icon-16.png",
    "48": "Icon-48.png",
    "54": "Icon-54.png",
    "90": "Icon-90.png",
    "128": "Icon-128.png",
    "270": "Icon-270.png"
  },
  "manifest_version": 2,
  "permissions": [
    "activeTab",
    "<all_urls>",
    "sessions",
    "storage"
  ],
  "description": "The ultimate universal wish list and source for gift giving inspiration. Add anything to your Gift Hero list with just a click.",
  "version": "2.0.7resigned1",
  "applications": {
    "gecko": {
      "id": "gifthero@gifthero.com",
      "strict_min_version": "42.0"
    }
  }
}