line-height 2px lower in firefox vs webkit

Question

I have the following css:

.btn_container {
cursor: pointer;
font-family: Tahoma,Verdana,Arial;
font-size: 11px;
padding: 0;
width: auto;
}

.btn_center {
bac         


        

Answer 1

I've done heavy testing of this in the past. I call it text jiggle. It's not something you can control. All you can do to minimize it is apply an explicit line-height (especially one in px) to every text element.

The default line-height varies by a wide margin in different browsers, and for different font families at different font sizes. Setting an explicit line-height addresses that.

But within that, the exact placement of the text within the line-height space will vary slightly browser-to-browser no matter what you do. For some combinations of font-size and line-height, all browsers match up. For instance, Arial at font-size:11px and line-height:14px renders the same in FF, Webkit, and IE. But change the line-height to 13px or 15px, and it varies by 1px browser-to-browser.

There's no standard or defined behavior for it. It's the result of how that particular font-family, font-size, and line-height happens to be rendered by the browser on that operating system. Arial, for instance, is a relatively consistent font, generally not varying by more than 1px as long as an explicit line-height is defined, while Helvetica varies by as many as 4 to 6 pixels.