I use KDevelop 5.5.0. I like the information that the Code Browser plugin provides, but don't like its behavior. I want it to show the tooltips only when I want them, for example only if the shift key is pressed. At the moment, as I move the mouse cursor around it throws unwanted tooltips, which is so annoying that I prefer to diable it if no customization is possible.
I'm not the only person who finds its behavior annoying (see, for example, KDevelop: How to disable source-code tool tips)