Examine source code of Gemini Web Translator

{
  "manifest_version": 2,
  "name": "Gemini Web Translator",
  "version": "2.1",
  "description": "Translate web pages and ask questions using Gemini API",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "gemini-web-translator-extension@masih.dev",
      "strict_min_version": "102.0"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>",
    "tabs",
    "downloads",
    "scripting"
  ],
  "web_accessible_resources": [
    "styles/selection-translator.css",
    "popup/popup.html",
    "styles/popup.css",
    "scripts/popup.js"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png"
    },
    "default_title": "Gemini Translator"
  },
  "page_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png"
    },
    "default_title": "Translate this page with Gemini",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "options_ui": {
    "page": "getting-started.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "scripts/content.js",
        "scripts/keyboard-shortcuts.js",
        "scripts/selected-text-translation.js",
        "scripts/mobile-popup.js"
      ]
    },
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "js": [
        "scripts/youtube-subtitles.js"
      ],
      "run_at": "document_end"
    }
  ]
}