Hello everyone, my website text appears slightly bigger in firefox than all other browsers.

I have tested my website on my laptop using web-kit browsers, IE and Firefox but Firefox alone displays text to be slightly bigger than the rest of the browsers. It has same rendering effects when it comes to images. I tried defining these elements using %, em, px etc but all in vain. I have test "bare bone" html code like: <body> <p>pleaseeeeeeeeeeeeeeeeeeeee help</p> </body> with css: p{font-size: 11px; font-family: Verdana, Geneva, Arial, Helvetica, Sans-Serif;} yet the results is as mentioned above. Other sites however render the same font-size on my laptop even in different browsers.