Thanks in advance, Nicolas
Cannot reproduce on the first URL, but the second one does open a window on clinking the select element. Very similar to Bug 658911.
This is a little different than the other bug. This bug is even worse than the other bug. Here I don't click on a link nor anything which is supposed to have an action.
I think almost any element can hook the click event to open a new window. The fact is, you clicked on it. If you don't click, the site doesn't force the window on you. If you don't like the window on click, don't use the site if its content doesn't fit you. FF popup protection is designed only to protect against windows that open even without you clicking anything.
Yes, I understand. So please open an ENHANCEMENT request to propose a stricter blocking function, as mentioned in Bug 658911. Actually, I can do it for you, wait a moment.