Examine source code of HubSpot DevMode Enabler

{
  "manifest_version": 2,
  "name": "HubSpot DevMode Enabler",
  "version": "1.3.0",
  "description": "Hängt ?developerMode=true an HubSpot Editor-Content-URLs an.",
  "permissions": [
    "tabs",
    "webNavigation",
    "*://app.hubspot.com/*"
  ],
  "background": {
    "scripts": [
      "bg-ff.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://app.hubspot.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hubspot-devmode@example.com",
      "strict_min_version": "91.0"
    }
  }
}