Unsolved How to stifle messages like "A Parser-blocking, cross-origin script..."
I have a basic PyQt5 app that uses QWebEnginePage to display selected web URLs, which often have advertisements on them. Some of these ads cause QWebEngine to log console messages of the form,
A Parser-blocking, cross-origin script, http://ads.thehiveworks.com/delivery/spc.php?zones=245|246|387&source=&r=29650133&charset=UTF-8&loc=http%3A//sssscomic.com/comic.php, is invoked via document.write. This may be blocked by the browser if the device has poor network connectivity. See https://www.chromestatus.com/feature/5718547946799104 for more details.
(n.b. the chromestatus url explains how the designer of the loaded page is doing things wrong -- but I have no control over that!)
As a work-around (not a solution) the user is doing the following:
python the_qt_script.py > /dev/null 2>&1
It is necessary to use "2>&1" to force stderr into /dev/null before these many annoying messages disappear. Of course, it is possible that meaningful messages are also being discarded! So, control of the Java Console output is still needed.