Try to minimize the number of browser extensions you use and have fewer tabs open at once to save memory and CPU resources. (howtogeek.com)
For instance the OS requires few tabs to be operated while there isn't a back button either. (goodereader.com)
The hamburger has also been removed, and while all of the same functionality is still here, the main Settings page is broken up into far fewer tabs to make navigation considerably easier. (9to5google.com)