My scroll bar is now on the left. how do I move it back to the right side?

You may have other problems as well. ''Scrollbars in the user interface may appear on the left or right side of the content, depending on whether the language viewed is read right-to-left or left-to-right. However, a user may want to keep the scrollbar on one side irrespective of the content’s language, or even the host OS’s language. This preference is an attempt to make the scrollbar position as customizable to the end user as possible.'' * http://kb.mozillazine.org/Layout.scrollbar.side In your '''about:config''' change configuration variable '''layout.scrollbar.side''' to '''2''' to place the scrollbar on the right side of the content. '''More information on configuration variables''' available in [http://kb.mozillazine.org/About:config_entries about:config (entries)] and for users not familiar with the process there is [http://kb.mozillazine.org/About:config about:config (How to change)]