When loading plugins on demand only is enabled, please make it possible to exclude specific sites, on which plugins are loaded automatically (as you can in Flashblock in Firefox). This would be nice not just for convenience: a few (shitty) sites decide to refuse to work if they sense that there is no Flash plugin, before you could even click on Start Plugin. Reproducible: Always
See bug 109529.
Dear user, KHTML (and KJS and all related Java/plugin infrastructure) was a long time more or less unmaintained and got removed in KF6. Please migrate to use a QWebEngine based HTML component. We will do no further fixes or improvements to the KF5 branches of these components beside important security fixes. For security issues, please see: https://kde.org/info/security/ Sorry that we did not fix this issue during the life-time of KHTML. Greetings Christoph Cullmann