Any website offering “Microsoft FrontPage 2013 free download for Windows 10” is likely distributing:
If a website claims to have a Microsoft product released in 2013 that Microsoft never made, the file is malicious. Microsoft Frontpage 2013 Free Download For Windows 10
If you want to update an old website to modern standards, use VS Code. Microsoft Frontpage 2013 Free Download For Windows 10
This is the direct descendant of FrontPage. Microsoft released before discontinuing it. Microsoft Frontpage 2013 Free Download For Windows 10