Maybe some of the suggestions from
https://www.ghacks.net/2021/01/05/sa...ox-and-chrome/
The save as ebook plugin is found at
https://github.com/alexadam/save-as-ebook
Remember, as long as the tool runs totally on your PC it should have no issues with pages that require authorization.
Of course, you will loose the ability to wirelessly sync the page(s).
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