You can try to increase the String pref layout.css.devPixelsPerPx from 1.0 to 2.0 in 0.1 steps to see what works best.<br /> In Firefox 3.6 and later this pref is a String value parsed to a float and allows to fine tune the dimensions of all elements more precisely. To open the <i>about:config</i> page, type <b>about:config</b> in the location (address) bar and press the <i>"Enter"</i> key, just like you type the url of a website to open a website.<br /> If you see a warning then you can confirm that you want to access that page.