Examine source code of Comment Fusion

{
  "manifest_version": 2,
  "name": "Comment Fusion",
  "version": "1.1",
  "description": "Displays comments for the current page in a sidebar",
  "icons": {
    "256": "logo256.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "https://api.commentfusion.com/*"
  ],
  "browser_action": {
    "default_title": "Toggle Comments Sidebar"
  },
  "background": {
    "scripts": [
      "static/js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "static/js/contentScript.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "static/js/*.js",
    "static/css/*.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b174bc1d-a978-46da-bf14-2939267a04d0}"
    }
  }
}