My solution is supposed to work with other browser plugins. The only difference is that I'm using http instead of the usual file protocol. In chrome theres an option to allow file access from local files without http (https://stackoverflow.com/questions...mlhttprequest-to-load-a-url-from-a-local-file), maybe theres a similar option in (qt)webkit?If the contents of html file itself don't change, I don't think we'll be able to resolve this problem. Is your solution supposed to work with other browser plugins at all?
EDIT: but the stupid thing here is that the html file does read the contents of the xml at startup, but it simply does not change when the xml changes.
EDIT2: The problem is fixed in the latest version. Thank you Bazukas!