resize firefox window

greetings forum
i am running 11 with kde3. the other day i tried to post some pic’s on photobucket using ff. a window opens to locate the file where the pictures are but is way to long for the screen. when i click resize it is only for up and down, no left and right. i fooled with it while and tried konqueror which would not even open the window. so i gave up and had to use the wife’s xp machine. so how do i shrink the window?

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