Examine source code of Video Transcript Summarizer

{
  "manifest_version": 3,
  "name": "Video Transcript Summarizer",
  "version": "2.0",
  "description": "Extracts and summarizes transcripts from YouTube and Vimeo using Gemini AI.",
  "permissions": [
    "storage",
    "scripting",
    "activeTab",
    "webRequest",
    "downloads"
  ],
  "host_permissions": [
    "*://*.youtube.com/*",
    "*://*.vimeo.com/*",
    "*://player.vimeo.com/*",
    "https://*.googleapis.com/*"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": "icons/icon.svg"
  },
  "icons": {
    "48": "icons/icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "transcript_summarizer@extension.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/watch*",
        "*://*.youtube.com/shorts/*",
        "*://player.vimeo.com/video/*"
      ],
      "js": [
        "content-scripts/summary-panel.js"
      ],
      "all_frames": true
    },
    {
      "matches": [
        "*://*.youtube.com/watch*",
        "*://*.youtube.com/shorts/*"
      ],
      "js": [
        "content-scripts/youtube.js"
      ]
    },
    {
      "matches": [
        "*://player.vimeo.com/video/*"
      ],
      "js": [
        "content-scripts/vimeo.js"
      ],
      "all_frames": true
    }
  ]
}