Examine source code of React Context DevTool

{
  "name" : "React Context DevTool",
  "version" : "4.2",
  "description" : "Devtool for React Context and useReducer",
  "manifest_version" : 3 ,
  "browser_specific_settings": {
    "gecko": {
      "id": "{7421498a-8968-4dd4-bf57-5d3c4ccd6a60}",
      "strict_min_version": "109.0"
    }
  },
  "icons" : {
    "16" : "assets/icons/icon16.png",
    "32" : "assets/icons/icon32.png",
    "48" : "assets/icons/icon48.png",
    "128" : "assets/icons/icon128.png"
  },
  "action" : {
    "default_icon" : {
      "16" : "assets/icons/icon16-disabled.png",
      "32" : "assets/icons/icon32-disabled.png",
      "48" : "assets/icons/icon48-disabled.png",
      "128" : "assets/icons/icon128-disabled.png"
    },
    "default_popup" : "popup/disabled.html"
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "devtools_page": "devtool/devtool.html",
  "options_ui" : {
    "page": "options/options.html" ,
    "open_in_tab": false
  },
  "permissions" : [
    "storage" ,
    "scripting" 
  ],
  "content_security_policy" : {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "web_accessible_resources" : [
    {
      "resources" : [
        "mainContent.js" 
      ],
      "matches" : [
        "<all_urls>" 
      ],
      "extension_ids": []
    }
  ],
  "host_permissions" : [
    "<all_urls>" 
  ],
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "js" : [
        "injectGlobalHook.js" 
      ],
      "run_at" : "document_start" 
    }
  ]
}