I wonder of anybody else has seen this one. I call it 'zoom creep'. I am using Firefox as a browser. As I am posting on the site, with each successive posting the font gets bigger and bigger. The only way I have found to get it back is to click on 'View' and then 'Zoom' and 'Reset'. Not sure whether it is a WordPress glitch or a problem with Firefox but it only happens with one of the sites I am managing. Any ideas?