ok, well then using the QWebEngineSettings::LocalContentCanAccessFileUrls attribute was not enough. Actually it seems be enough to extract the main html file to a local tempdir. I can still load other resources via qrc afterwards.

I think it would be nice if it was possible to extend and reduce the resource dictionary runtime so you could access bytearrays using :/ and qrc:/.

Ie:
* QResource::addData(const QString &path, const QByteArray &data);
* QResource::removeData(const QString &path);

Cheers Jakob