Examine source code of Lumberjack

{
  "manifest_version": 2,
  "name": "Lumberjack",
  "version": "1.0.4",
  "commands": {
    "save_loggin": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      },
      "description": "saves the login of the focussed text input"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "lumberjack@csaccoccio.fr"
    }
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "48": "icon.png"
  }
}