The library supports all major browsers including Chrome, Firefox, Safari and Internet Explorer.
Internet Explorer 9 requires polyfill for
<picture> implementations. We are recommending to use
picturefill version 3. Pixboost-js has integration with
it and will call
window.picturefill() once replacements are done.
Lazy loading is using Intersection Observer feature that supports by all major browsers except for Safari. You can use polyfill, but make sure that you are doing thorough testing (see more details in lazy loading section).