Examine source code of Math-o-Matic

{
  "manifest_version": 2,
  "name": "Math-o-Matic",
  "description": "Math-o-Matic detects and solves mathematical equations on the page, showing step-by-step solutions",
  "version": "1.0",
  "icons": {
    "64": "64.png",
    "128": "128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "64.png",
    "default_title": "Math-o-Matic",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{193c9389-9081-43c7-a571-9a90bd5383b1}",
      "strict_min_version": "90.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}