Up until the last week, on my iMac, if I clicked on the Firefox button on my bottom toolbar, both of my main FF windows (each with multiple tabs and open all the time) would come to the front of the screen. Now, only one window comes up and I have to specifically select the other window to see it. Is this a new behaviour or have I inadvertently deactivated whatever it was that let me do as I have always done previously! I can't find any setting that appears to refer to this condition.