When I try to select bookmarks I am stymied because the mouse control is overridden. This became a recent problem. The way it worked in the past is that items were selected only when left mouse button was pressed.
I select from bookmarks menu a folder containing folders & bookmarks, but I cannot select what I want because an automatic action occurs where my mouse cursor is right then. Selecting what I want from the list is impossible as an undesired selection opens inadvertently, without me any positive action by clicking left mouse button. This problem did not exist 6 months ago. This is now a big problem for me. I'm going to stop using FireFox if this problem cannot be fixed soon!