I suggest changing the default combination alt+mouse (moving the window), as it conflicts with many other combinations in various games and programs. It is possible to use super+mouse, for example. KDE recently also used alt+mouse, but rejected it.
There is also the problem that ctrl+f5 in Firefox does not work in Xfce.
I believe the default combination for window moving is standard across the desktops, so it’s unlikely to go away…
In Firefox, you can also full-refresh using ctrl+shift+R.
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If you open Settings Manager > Window Manager Tweaks > Accessibility (tab), you’ll see the option Key used to grab and move windows.
There you can change the default key to Super, or any other from the predefined list of keys.
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That’s why I love Xfce 
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