very often the add-ons pane not displaying anything, only a blank pane
                    This occurred before several times ago, but recently, this is happening very often. Now I almost can't access the contents in this pane because it happens almost all the time. Not sure how to fix this. 
BTW, the add-ons pane need a slider bar so that one can scroll up and down when one installs many plugins. Currently I'm having trouble seeing those items at the bottom of the add-ons list.
                            BTW, the add-ons pane need a slider bar so that one can scroll up and down when one installs many plugins. Currently I'm having trouble seeing those items at the bottom of the add-ons list.
 Upgrade Storage