Examine source code of Instant Selection Translator

{
  "manifest_version": 3,
  "name": "Instant Selection Translator",
  "description": "Translate selected text instantly, with optional German learning details.",
  "version": "1.0.0",
  "permissions": [
    "storage",
    "contextMenus"
  ],
  "optional_host_permissions": [
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "action": {
    "default_title": "Instant Selection Translator",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "commands": {
    "translate-selection": {
      "suggested_key": {
        "default": "Alt+Shift+T"
      },
      "description": "Translate the selected text"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "instant-selection-translator@example.invalid",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": []
      }
    }
  }
}