If you only need one page, not an entire site ripping, use a browser extension like "SingleFile" or "Save Page WE." These save a perfect HTML copy of the current page (including CSS/JS) into a single .html file.
If you are looking for well-maintained, open-source alternatives for web mirroring, consider these industry standards: 1siterip
If you admire a website’s content or code, learn from it through legal channels (view source, inspect element), but never hit the "download entire site" button without explicit written permission. The kilobytes you save may be outweighed by the legal fees you incur. The 1siterip Paradox: When Downloading a Website Becomes