I seem to be having lots of wee bugs using firefox (my browser of choice as I use firebug for coding/css) and wmpudev (leaving me feeling very, very frustrated.... agghhhh)
When i drag handles up - items jump back down. Text editing in text boxes doesn't always work in 2 clicks. Adding shortcodes to a text box seems to mean refreshing a lot. I am saving every 5 mins. I have had a text box I am editing vanish from my screen. I don't get tool tips when using upfront - unlike in edge (microsoft edge) or chrome. Is firefox just not compatible with wpmudev?