Examine source code of HW Helper

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "version": "1.0.8",
  "author": "CMF",
  "icons": {
    "20": "images/icon_20.png",
    "32": "images/icon_32.png",
    "48": "images/icon_48.png",
    "64": "images/icon_64.png",
    "96": "images/icon_96.png",
    "128": "images/icon_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://i-heroes-vk.nextersglobal.com/*",
        "https://i-heroes-mm.nextersglobal.com/*",
        "https://i-heroes-mg.nextersglobal.com/*",
        "https://i-heroes-ok.nextersglobal.com/*",
        "https://i-heroes-fb.nextersglobal.com/*",
        "https://hero-wars.com/*",
        "https://www.hero-wars.com/*"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "js": [
        "contentscript.js"
      ]
    }
  ],
  "permissions": [
    "https://i-heroes-vk.nextersglobal.com/*",
    "https://i-heroes-mm.nextersglobal.com/*",
    "https://i-heroes-mg.nextersglobal.com/*",
    "https://i-heroes-ok.nextersglobal.com/*",
    "https://i-heroes-fb.nextersglobal.com/*",
    "https://hero-wars.com/*",
    "https://heroes-vk.nextersglobal.com/*",
    "https://heroes-mm.nextersglobal.com/*",
    "https://heroes-mg.nextersglobal.com/*",
    "https://heroes-ok.nextersglobal.com/*",
    "https://heroes-fb.nextersglobal.com/*",
    "https://heroes-wb.nextersglobal.com/*"
  ],
  "web_accessible_resources": [
    "main.js"
  ],
  "browser_action": {
    "default_title": "HW Helper",
    "default_icon": "images/icon_48.png",
    "default_popup": "panel.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{48229f99-6e8b-43f2-ba81-260f59af903c}"
    }
  }
}