Examine source code of SEO-tools

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "ru",
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "SEO-tools",
    "default_icon": "img/logo64.png"
  },
  "icons": {
    "64": "img/logo64.png",
    "128": "img/logo128.png"
  },
  "homepage_url": "https://100zona.com/seo-tools",
  "version": "2.9.9.1",
  "manifest_version": 2,
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "content_scripts": [
    {
      "matches": [
        "https://*/*"
      ],
      "js": [
        "popup.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "https://*/*",
    "http://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b578f2a-f37d-430d-8ece-6f73da5d9ec3}"
    }
  }
}