When the users try to click links on a web page, a URL tooltip appears in the bottom of web page.  Therefore, the users can make sure of the URL they would click. The problem is that the URL tooltip can overlap the links located in the bottom of web page, so it prevents the user from clicking the links. 
In the case of Chrome, the URL tooltip hides of itself to allow the users to click the bottom link, so we need to improve the URL tooltip feature like Chrome.