Examine source code of Goshares

{
  "manifest_version": 2,
  "homepage_url": "https://www.goshares.org/",
  "description": "",
  "chrome_url_overrides": {
    "newtab": "iframe.html"
  },
  "chrome_settings_overrides": {
    "homepage": "https://www.goshares.org",
    "search_provider": {
      "name": "GoShares",
      "keyword": "goshares.org",
      "search_url": "https://www.goshares.org/?q={searchTerms}",
      "favicon_url": "https://www.goshares.org/img/goshares_logo.png",
      "encoding": "UTF-8",
      "is_default": true
    }
  },
  "icons": {
    "16": "./img/16_1.png",
    "32": "./img/32_1.png",
    "48": "./img/48_1.png",
    "128": "./img/128_1.png"
  },
  "name": "Goshares",
  "background": {
    "scripts": [
      "ext-background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "https://www.goshares.org/*",
    "webNavigation",
    "activeTab",
    "tabs",
    "cookies"
  ],
  "version": "1.100",
  "applications": {
    "gecko": {
      "id": "info@exploreos.com",
      "strict_min_version": "56.0a1"
    }
  }
}