i knew but now i don't know how to do it again.
i know it must be simple but i just cannot find it .
so there is impossible? temporarily or for ever?
It's still there - you just need to hover over the area where the star is (view the image on the above link) - the star only appears now when you hover over the area. Then, click the star to add the game to your bookmarks. It's confusing. I had to play with it for 10 minutes to figure it out.