New Tab and Start Page Displayed

[Z6-Po-StarWars]

When I open a new tab, it's impossible to tell it to display an HTML page that's local (on hard disk), yet it's this page that I want when I open a new tab.
Years ago, this was possible, or it was possible to download an Add-on for this, but today there's no longer this kind of add-on, which used to be very nice!

[Jon]

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