hello, it's the intended behaviour that firefox 22 and above is now respecting the pixel density you've set on a system level in the windows control panel > appearance > display (in order to better support high-density displays). other browsers will follow suit soon... if you want to set the text size/pixel density in firefox different from that of your system's settings like it was handled in prior versions, enter '''about:config''' into the firefox address bar (confirm the info message in case it shows up) & search for the preference named '''layout.css.devPixelsPerPx'''. double-click it and change its value to '''1.0''' (or any other zoom factor that fits your purpose: 1.0 relates to 100%, 0.8 equals 80% and so on; -1.0 is the default value and will adhere to the system settings).