This is a feature that usually video players have. You put a window "always on top", then it is not covered by other windows that you open. That it would be useful in many ways. For instance, I need to check an online dictionary, the plurals of every german noun before I added to mnemosyne. Now the firefox window covers mnemosyne and I need to re-click mnemosyne in the taskbar in order to open it again to write the info.
This is a feature that usually video players have. You put a window "always on top", then it is not covered by other windows that you open. That it would be useful in many ways. For instance, I need to check an online dictionary, the plurals of every german noun before I added to mnemosyne. Now the firefox window covers mnemosyne and I need to re-click mnemosyne in the taskbar in order to open it again to write the info.