Makes no sense (IMO, anyway).

One doesn't "configure certain settings on a webpage" and doing any kind of config with the contents of textboxes in a form on an html page (even if https) verges on suicidal.

Please clarify.

• WHAT are you trying to configure:
  • the browser?
  • some other program?
    or
    
  • the rendering of the webpage content? (In that case, knowledge of your markup langugage - html? - and perhaps CSS is what you need)
• If you merely need to prepopulate textboxes (and that's readily done if you know your markup), why are you not creating the page -- prepopulated content, included -- with the "app" ("CGI script")?
    and (though your problem statement appears to rule this out)
• if you're merely providing info so a user can apply it, a "form" in the sense of html is not the way to do it: use a list or table or even simple paragraphs.

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