Examine source code of Quick Reply for GitHub

{
  "manifest_version": 2,
  "name": "Quick Reply for GitHub",
  "version": "1.2resigned1",
  "description": "Adds a \"Quick Reply\" button to GitHub issues and PRs.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_icon": {
      "48": "icons/icon-48.png"
    },
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://github.com/*"
      ],
      "js": [
        "content_scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5db93bee-0b67-4caf-bec5-01fa23254e5d}"
    }
  }
}