Examine source code of Launch Observer

{
  "manifest_version": 2,
  "name": "Launch Observer",
  "version": "0.1.4",
  "description": "Observe and inspect analytics network calls with decoded payloads.",
  "browser_specific_settings": {
    "gecko": {
      "id": "launch-observer@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "browser_action": {
    "default_title": "Launch Observer"
  },
  "background": {
    "scripts": [
      "background/firefox-background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "content/inject.js"
  ],
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "webNavigation",
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}