I kind of "solved" this problem by uninstalling LibreOffice (including the plugin package), creating a new Firefox Profile (deleting the old one) and reinstalling LO (including plugin package). This worked for me so far - although this is no real solution.
I kind of "solved" this problem by uninstalling LibreOffice (including the plugin package), creating a new Firefox Profile (deleting the old one) and reinstalling LO (including plugin package). This worked for me so far - although this is no real solution.