When you have a webpage open try pressing F12 to close Developer Tools and see if it still does it.
For more info do a Google search, copy & paste the following:
keyboard shortcut open 'Developer Tools' box
Nokia 8 vs Galaxy S8
How artist Alex Yanes worked with his daughter on this bright 3D mural for Monument Valley 2
iMac 21.5-inch (2017) review
Comment regarder le lancement du Galaxy Note 8 en direct ?