Examine source code of HackerNewsNoDang

{
  "manifest_version": 2,
  "name": "HackerNewsNoDang",
  "version": "1.0",
  "description": "Automatically hides unsubstantive comments made by user @dang on HN threads.",
  "icons": {
    "48": "nodang.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.ycombinator.com/*"
      ],
      "js": [
        "nodang.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0900e24b-c99e-4189-b3ac-0067d62e2d84}"
    }
  }
}