Examine source code of extended-benis

{
  "manifest_version": 2,
  "name": "extended-benis",
  "version": "0.0.2",
  "description": "Decorates the \"Benis\" display on pr0gramm.com with more detailed information about up- and downvotes. This adds details both to the post Benis as well as the comment Benis counts.",
  "icons": {
    "48": "logo.svg",
    "96": "logo.svg",
    "128": "logo.svg",
    "144": "logo.svg",
    "192": "logo.svg",
    "240": "logo.svg",
    "256": "logo.svg",
    "288": "logo.svg",
    "512": "logo.svg"
  },
  "author": "Richard Schwab",
  "homepage_url": "https://github.com/Nothing4You/extended-benis",
  "developer": {
    "name": "Richard Schwab",
    "url": "https://github.com/Nothing4You/extended-benis"
  },
  "permissions": [
    "https://pr0gramm.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://pr0gramm.com/*"
      ],
      "js": [
        "scripts/content.js"
      ],
      "run_at": "document_start"
    }
  ]
}