Examine source code of Oildrop

{
  "manifest_version": 2,
  "name": "Oildrop",
  "version": "1.0.3",
  "description": "An open-source userscript manager that you can audit on your own.",
  "permissions": [
    "storage",
    "tabs",
    "downloads",
    "<all_urls>"
  ],
  "browser_action": {
    "default_title": "Oildrop",
    "default_popup": "ui.html"
  },
  "background": {
    "scripts": [
      "js/oildrop.js",
      "js/background.js"
    ]
  },
  "icons": {
    "48": "assets/oildrop_icon@48px.png",
    "96": "assets/oildrop_icon@96px.png"
  },
  "user_scripts": {}
}