Using Qt 5.7.0 on Windows 10.

I create an URL using fromLocalFile(), then I add a fragment using setFragment(). The method toString() shows that the fragment is correctly used in the URL.

Then, I call QDesktopServices::openUrl() on this URL. In the browser, the URL misses the fragment. This has been tested with Firefox and IE as default browsers with the same result.

Example:

#include <QApplication>
#include <QDesktopServices>
#include <QUrl>
#include <QtDebug>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QUrl url(QUrl::fromLocalFile("C:\\Temp\\qtlmovie-user.html"));
    url.setFragment("tabTools");
    qWarning() << "Qt:" << qVersion() << "URL:" << url.toString();
    bool ok = QDesktopServices::openUrl(url);
    qWarning() << "openUrl returned" << ok;
}

Display:

Qt: 5.7.0 URL: "file:///C:/Temp/qtlmovie-user.html#tabTools"
openUrl returned true

In the address bar of the browser, we see:

file:///C:/Temp/qtlmovie-user.html

The transmitted URL has no trailing "#tabTools" and the display is at the top of the page, not at the target anchor.