Examine source code of Lookuber – YouTube Subtitles & Web Dictionary

{
  "manifest_version": 3,
  "name": "Lookuber",
  "version": "1.0.0",
  "description": "Click words in YouTube subtitles—or on any web page—to look them up across multiple dictionaries, hear pronunciation, and save them to your own vocabulary book.",
  "author": "weiwei84530",
  "homepage_url": "https://github.com/weiwei84530/lookuber",
  "browser_specific_settings": {
    "gecko": {
      "id": "lookuber@weiwei84530",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs"
  ],
  "host_permissions": [
    "*://*.youtube.com/*",
    "https://api.dictionaryapi.dev/*",
    "https://translate.googleapis.com/*",
    "https://dictionary.cambridge.org/*",
    "https://cn.bing.com/*",
    "https://jisho.org/*",
    "https://www.moedict.tw/*",
    "https://freedictionaryapi.com/*"
  ],
  "background": {
    "scripts": [
      "src/background/background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*"
      ],
      "js": [
        "src/content/youtube/index.js"
      ],
      "css": [
        "src/content/styles.css"
      ],
      "run_at": "document_start",
      "all_frames": false
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content/web-select/index.js"
      ],
      "css": [
        "src/content/styles.css"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "src/content/*.js",
        "src/content/youtube/*.js",
        "src/content/web-select/*.js",
        "src/content/card/*.js",
        "src/shared/*.js",
        "src/shared/*.css",
        "src/pages/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "action": {
    "default_title": "Lookuber",
    "default_popup": "src/pages/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "options_ui": {
    "page": "src/pages/options.html",
    "open_in_tab": false
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  }
}