I have a wordpress website, which presents one specific page in Firefox no good: when I touch the screen to scroll, the page slides slightly to the left. Some 5px space comes at the right side. In Chrome this problem does not occur. Other pages of the same website don't have the problem either. I tested uninstalling all specific wordpress plugins but did not succeed. I have a Top Slide Button at the right side that stays sticky to the right side. Screenshot provided. Anyone recognizing and/or a solution? Thanks in advance!