I am using an extension All-In-One Gestures. It works on my other installation of Firefox 4 - particularly, the right-click menu pops up if I click right mouse button and then release it so I can perform gesture or turn the wheel instead of getting a right click menu. But on this installation (basically the same addons and OS), the right-click menu pops up on pushing down the right mouse button so the right-button+wheel gestures do not work, and the menu stays there while I am performing the gesture which is rather annoying. So I though maybe there is some obscure configuration option to toggle to make right-click menu pop up after the button release? Or is this entirely the extension's fault? Note that it does work as expected on other installation...