Examine source code of OriginMarker

{
  "name": "OriginMarker",
  "version": "1.2",
  "description": "Origin dependent marker",
  "permissions": [
    "tabs",
    "bookmarks",
    "storage"
  ],
  "background": {
    "scripts": [
      "static.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "originmarker@ndevtk"
    }
  },
  "manifest_version": 2
}