Examine source code of Reading Session Saver

{
  "manifest_version": 2,
  "name": "Reading Session Saver",
  "version": "1.0",
  "description": "Saves the scroll position of a webpage, helping you return to where you left off when reopening it later.",
  "permissions": [
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/save.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b693fd16-2fdd-4597-a4b7-bed42c915e91}"
    }
  }
}