Examine source code of Mail Template Sender fs

{
  "manifest_version": 2,
  "name": "Mail Template Sender",
  "version": "1.0",
  "description": "Pobiera email i nazwę firmy ze strony i tworzy maila z szablonem",
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "Wyślij maila z szablonu"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+M"
      },
      "description": "Wyślij maila z szablonu"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{79e61054-dc34-42e4-ad99-f5646a4310a9}"
    }
  }
}