Examine source code of MarsConnect

{
  "manifest_version": 3,
  "name": "MarsConnect",
  "description": "MarsConnect helps you temporarily connect data between different browser clients and provides refined control.",
  "version": "0.1.13",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ac8aa7bb-c3fd-4dcd-95d3-76f229652a1a}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "alarms",
    "browsingData",
    "cookies",
    "declarativeNetRequest",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "MarsConnect",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/mainutils.js"
      ],
      "world": "MAIN"
    }
  ]
}