Examine source code of glean capture

{
  "manifest_version": 3,
  "name": "glean capture",
  "version": "0.1.1",
  "description": "Capture LinkedIn Learning / YouTube transcripts into glean and get live study notes while you watch.",
  "browser_specific_settings": {
    "gecko": {
      "id": "glean-capture@lumivara.tech",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent"
        ],
        "optional": []
      }
    },
    "gecko_android": {}
  },
  "permissions": [
    "activeTab",
    "storage",
    "cookies"
  ],
  "host_permissions": [
    "http://127.0.0.1/*",
    "http://localhost/*",
    "https://*.ts.net/*",
    "https://*.linkedin.com/*",
    "https://*.youtube.com/*",
    "https://*.google.com/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "glean capture",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.linkedin.com/learning/*",
        "https://www.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}