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
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
An overview: What leading creative agencies are doing to improve diversity
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.