If you're looking to Download Webarchive to HTML on your Chromebook laptop Then read the following guideline.

Webarchive to HTML allows you to extract the resources in a .webarchive document and save them in .html format. Converting your .webarchive documents to .html format allows you to read your materials in your favorite web browsers such as Safari, Chrome, Firefox, Opera or Internet Explorer. With the help of Webarchive to HTML, all the resources in an .webarchive document including HTML, CSS, images and any other kinds of files are extracted to their original format, so you can also inspect/edit/reuse them. Usually the convert result contains 2 parts, the HTML file "filename.html" and the resource folder "filename.files", which is very intuitive.