Or SingleFileZ files which can be viewed without installing any extension https://github.com/gildas-lormeau/SingleFileZ https://github.com/gildas-lormeau/Single

Or SingleFileZ files which can be viewed without installing any extension https://github.com/gildas-lormeau/SingleFileZ https://github.com/gildas-lormeau/SingleFileZ. Edit: it can also auto-save pages, like SingleFile.