Examine source code of HN Blocklist

{
  "name": "HN Blocklist",
  "version": "0.0.2resigned1",
  "manifest_version": 2,
  "description": "This extension allows you to block users on Hacker News.",
  "homepage_url": "https://github.com/morgante/hn_blocklist",
  "permissions": [
    "storage",
    "http://news.ycombinator.com/*",
    "https://news.ycombinator.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "http://news.ycombinator.com/*",
        "https://news.ycombinator.com/*"
      ],
      "js": [
        "src/inject.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{62b0960b-c999-4d92-8007-82a9e82ed16e}"
    }
  }
}