An essential for the upmost secure and private browsing experience. Just make sure to periodically go in the settings, use the "back up to file" function and store that file in a cloud, such as Google Drive or preferably a privacy-respecting provider (Proton Drive or Sync).

If it's recommended by PrivacyTools.io, it's good on my book. If you haven't checked them out, they have other solid privacy recommendations.