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

MHT Viewer is a lightweight MHT (MHTML/MIME HTML) document viewer/reader. * Features • Lightweight and fast • Minimal reader user interface • Supports .mht, .mhtm, .mhtml files • Text zoom (zoom in / zoom out / actual size) • Keyboard shortcuts to navigate back / forward / home • Preview MHT files with MHT Quick Look plug-in • Export page to PDF / Webarchive • Printing