Examine source code of Links Saver

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Links tracker",
  "description": "a light extension that saves favourite links and urls in browser's storage",
  "action": {
    "default_popup": "index.html",
    "default_icon": "LS.png"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{95737fa7-d7f3-4cf7-b8b7-5f7ed04523f0}"
    }
  }
}