Dears, i asked the question already and currently it does not seem to be possible to catch all keyboard and mouse input when using a browser.
Does anyone see a way to circumvent that problem e.g. by using an electron application or something like that (not a developer here) As far as i can see, i am by far not the only one thinking that this is a major problem, if we would have this feature it would make guacamole so much more useful for use and acceptance would be much higher. If i would have a pointer, then i could see wheter i can get development resrouces to create something like that. Cheers Soeren