New Tab
Lot has been happening in browser UI. Chrome is the one which has got the elegant design as of now with Firefox & Opera catching up. IE doesn't about it anyways. One feature that is common in all these browsers (including Safari, on windows it's a crap) have is the placement of new tab button.
Not an UI designer myself but I want menu & button to be easily accessible. So, what's the easiest way to open an new tab using mouse? Ctrl + T is obviously the simplest but weren't going to consider it because 80% of the browsing time there's no need for keyboard.
Look at the below screenshot,

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Merry Winter Solstice