Mobirise Web Page Creator — Lazy Load Extension

Learn more: https://mobirise.com/extensions/lazy-load/?mbrui=Y2FsZ3xnfWtOaWNvZ2IgbWFj

With Lazy Load Extension, you can optimize and reduce the number of CSS rules. Also, it’s possible to delay the uploading of images. Moreover, you can check if images are enough compressed for the web and optimize the browser’s cache.