Examine source code of WebSharePreview

{
  "manifest_version": 2,
  "name": "WebSharePreview",
  "version": "1.0.1",
  "description": "Preview how a webpage looks when shared on Discord, Twitter/X, and Google Search.",
  "author": "mayzelf",
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    },
    "default_popup": "popup.html",
    "default_title": "WebSharePreview"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "websharepreviewer@mayzelf",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}