Having a resource available offline is often a good idea as you can access it at any time without having to worry about Internet connectivity or availability of the resource on the Internet. All modern web browsers support basic functionality to save webpages to the local system.
Google plans to block all insecure downloads in coming versions of the company's Google Chrome browser. Insecure downloads, according to Google, are downloads that originate from HTTPS websites that are not served via HTTPS. The decision won't affect sites that are still accessed via HTTP.