I have obviously hit a button somewhere/how on my iPad, and now the status bar displays in negative form, white on black, and every time I try to enter either Google or AB I am asked to sign in, although the 'stay signed in' box has been ticked.
Bt, click the link to see a screen shot of what you should be seeing when you tap the browser bar, you'll see where the word private is. Ignore the coloured squares, they're just my book marks.