Are there plans to update it w/ sound notification?
Does anyone know of an addon with similar functionality?

It would be nice if this addon can notify other changes too, for example when some text in the page appears or disappears. sometime the title never changes.

cool addon - especially with the KDE Connect ^_^, and I'd love to score 5, but...
scoring only 3 because options do not take effects. in another words: addon currently non-customisable (2017-12-01).