Examine source code of Fire

{
  "short_name": "Fire",
  "name": "Fire",
  "version": "0.0.2.25",
  "description": "Fire is a tool that makes Web3 simple, by showing you what happens at the smart contract level in a human-readable format.",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "js/background.bundle.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "activeTab",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "assets/images/Fire.png",
      "128": "assets/images/Fire.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/contentScript.bundle.js"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "js/inject.bundle.js",
    "js/scriptShell.bundle.js"
  ],
  "icons": {
    "16": "assets/images/Fire.png",
    "32": "assets/images/Fire.png",
    "48": "assets/images/Fire.png",
    "128": "assets/images/Fire.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b12c8974-64dd-4022-8208-ed48e6979360}"
    }
  }
}