Regardless of whether Hovercards is on or off, the tooltip doesn't appear when you hover over a link after the page is loaded. The 'title' attribute of <a> tag disappears in that moment. I think, Hovercards ext does it.
Browsers: Chrome, Firefox.
- Disable the PP feature (either the beta feature or the user preference)
- Dwell on a link.
- Observe that the link's native tooltip appears.