When hovering a link and then clicking it the shown Hovercard quickly disappears only to be immediately shown again before the new page loads.
Detailed steps to reproduce:
Hover over a link → Wait for the Hovercard to appear → Click the link
- Notice how the hovercard disappears
- Notice how the hovercard reappears
- Notice how the link loads afterwards
This happens for me on Windows 7 using Firefox 29.0.1