Examine source code of Linky

{
  "name": "Linky",
  "short_name": "Linky",
  "description": "Easy links management",
  "manifest_version": 2,
  "version": "0.3.2",
  "content_security_policy": "script-src 'self' ; object-src 'self'",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "commands": {
    "create-link": {
      "suggested_key": {
        "default": "Ctrl+Alt+D"
      },
      "description": "Create a new link"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{65627a9c-afc2-499c-aec4-f274ef48e6ca}"
    }
  }
}