latest update to Ubuntu 14.04 installed Firefox v47. Now all pages in Firefox are impossible small and won't zoom (CTRL ++). Zoom is missing from the control menu (top right drop down with 3 horizontal bars). There are no changes to my hardware or hardware settings. changing font sizes under preferences will enlarge the font on the page, but the images remain small. EG - the check box next to the message in gmail is impossibly small - you wouldn't know what it is if you didn't already know.