Examine source code of arxiver

{
  "name": "arxiver",
  "description": "Download arxiv with its name",
  "version": "1.0",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage",
    "downloads",
    "http://arxiv.org/*/",
    "https://arxiv.org/*"
  ]
}