Mouse is still a king on the desktop. But for some strange reason, with every new release, Firefox UI is less and less suitable for usage with mouse. Just to name a few recent issues:
- Hiding scrolls, that a hard to find and grab, when you need them
- Huge tabs and other UI elements. They are wasting screen space and do not add any additional comfort.
- Browser is not friendly to a tipical mouse gestures. For example you need to click on an item in main menu, instead of just hovering over it. Tab overflow menu does not support drag and drop.
- Menus have lost icons, which have been a great way to speed up navigation.
All of that should be fixed in default UI behavior, and touch friendly features moved to some special UI mode.