> Vertical tabs are clearly superior The tradeoff of sacrificing some horizontal page space for a vertical tab list is indeed worthwhile if you're opening and

> Vertical tabs are clearly superior The tradeoff of sacrificing some horizontal page space for a vertical tab list is indeed worthwhile if you're opening and revisting 10 or 15+ tabs. I've got about 150 open right now. However, I'm pretty sure that the vast majority only have open between 4 and 7 tabs almost all of the time. If this is true, and if it remains true, then it's likely the primary reason why horizontal tabs have been the default in browsers, and why it will remain the default.