Examine source code of Super Highlight Search

{
  "manifest_version": 3,
  "name": "Super Vivid Finder",
  "description": "In page text find tool. High contrast highlighting makes it easy to find!",
  "version": "1.0.5",
  "default_locale": "en",
  "action": {
    "default_title": "Super Vivid Finder",
    "default_icon": "images/popup16.png",
    "default_popup": "popup.html"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+F"
      },
      "description": "Popup Super Vivid Finder"
    }
  },
  "permissions": [
    "scripting",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "browser-addon@fumito80.jp",
      "strict_min_version": "120.0"
    }
  }
}