Examine source code of ScrollSvr

{
  "manifest_version": 2,
  "name": "ScrollSvr",
  "version": "1.0",
  "description": "Remembers scroll position on each web page and automatically scrolls to that position when revisiting.",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "popup.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6e1ff1e6-12d2-4654-a433-d9229a18be3d}"
    }
  }
}