As soon as you press F12 and select the element in question, you will be shown the CSS styles on the right - this, however, does not update when you hover over the element, as in FireBug, and you cannot set it as': soar . What you can do is when the element is selected, make sure that the focus is on the developer panel and hover over the element on the page - while it is pointing at it, press F5 - if you are re-selecting this element now, the styles on the right side will show you styles :hover (trace styles will also be updated)
source share