title: What is the default font for tooltips in browsers?
body: <p>I know the browser decides what its tooltips (via HTMl title attribute) look like and that it can't be changed except maybe with some browser settings. In my case Internet Explorer, Firefox, Chrome and Safari all used the same font, which looked quite similar to Segoe UI. Where do they draw that from?
  I need to simulate the look of the tooltips and therefore would need to know which font is used.</p>