I have just installed the KitKat update on my Sony Xperia Z and very quickly found that there was something a little different about Chrome: - If I tried closing all tabs Chrome would just close. - If I opened Chrome it would always show the sonymobile.com start page. I was very annoyed and have even canceled the Xperia Z3 pre-order, but then I have quickly found a way to fix this. So if you are having the same problem, simply do the following: 1) Go to Settings-Apps 2) Find the process called com.android.partnerbrowsercustomization.chromeHomepage... (the actual name might be even longer - it doesn't fit in the screen). 3) Disable it. Hope that helps someone.