Use Google Chrome, version 116 or later, for the GetProspect extension. It opens in Chrome's side panel, which older versions do not have. To check your version, open chrome://settings/help.
The web app works in any modern browser: Chrome, Edge, Firefox or Safari. You can search, save, enrich, verify and export there without the extension.
Other browsers built on Chromium can install extensions from the Chrome Web Store, but we build and test the extension for Chrome only. In Opera, the panel opens from the GetProspect icon in Opera's own sidebar rather than from the toolbar.