Rated 5 out of 5 stars

Hi, Fredrik,

this little add-on of yours - I simply love it! It's ever so helpful.
But: The "Minimize on close" doesn't work any longer 8•(
When clicking the X in the upper right corner Firefox disappears and is gone ... (that's been happening now for some weeks).
I've just upgraded to the x64 version of FF and here I have the same behaviour, unfortunately.
Is this a known bug or is it a feature? Are there any suggestions or remedies?

Thank you for all answers!