How to prevent writing a site to history?

[goodwin74]

For example, there is a start page "browser:\startpage" (a SchemeHandlerFactory has been created for this page). From this page the user can go to other sites and return to the start page using the "Back" button.

How can I prevent this page from being written to history, so that after switching to another site it is impossible to go back?
I would be very grateful for a hint on how to implement this :)

p.s. WinForms / VS2019 / C# / CefSharp 86

[goodwin74]

I want to say right away that I tried to implement this through OnBeforeBrowse.
if (request.Url.StartsWith("browser:") && (request.TransitionType == TransitionType.ForwardBack|| request.TransitionType == (TransitionType)50331649)) { return true; }

But there is a problem. You cannot go back, but the back button and the "CanBack" property are still active. Therefore, I think, is it possible to prevent the site from being recorded in history at all?

[amaitland]

Chromium has the concept of an interstitial page which it uses for displaying the start page/errors (they don't appear in the history), unfortunately CEF doesn't as yet support this. There was some discussion a while ago (see https://bitbucket.org/chromiumembedded/cef/issues/2586/loadstring-results-in-terminating-renderer#comment-52020179) though I haven't seen any progressing on this.

You can try using the DevTools api and calling Page.resetNavigationHistory after you navigate away from your start page.

Look something like the following (I haven't run this code so might need some minor corrections).

using (var client = chromiumWebBrowser.GetDevToolsClient())
{
  _ = client.Page.ResetNavigationHistoryAsync();
}

[goodwin74]

thank you!!