With wget you can mirror complete websites with: wget --mirror --convert-links --adjust-extension --page-requisites website
Is there some equivalent way for using a browser like Firefox or Chromium and download the complete website (maybe with some scripting) ? I'm wondering if e.g. all images would be saved and not just the preview. So if I click on an image in the offline version I get the larger version of the image. Or if I click a link I would get redirected to the local version of the link.