After upgrading to Plasma 5.10.5 in Debian testing, I noticed that Firefox (56.0b8 in my case) is not reacting on scrolling
or any mouse action like middle clicks on the left most edge, when it's maximized. I'm not sure whether it's Plasma or
Firefox issue. Did anyone notice it?
For now I opened Firefox bug here: https://bugzilla.mozilla.org/show_bug.cgi?id=1396445
But it as well can be KDE bug really.