Examine source code of vimscrolling

{
  "manifest_version": 2,
  "name": "vimscrolling",
  "description": "vim scrolling.",
  "version": "1.0.0",
  "applications": {
    "gecko": {
      "id": "roflsemaildump@gmail.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_start",
      "match_about_blank": true
    }
  ]
}