"We wanted it to be familiar but also wanted it to embrace some of the modern paradigms of the web," Mayer said of the product revamp on US TV network NBC's Today show on Wednesday.
"One thing that I really like is this very personalised newsfeed; it's infinite and you can go on scrolling forever," she said.
Among other problems, Yahoo has been plagued by internal turmoil that has resulted in a revolving door of CEOs. Mayer, 37, took over after a tumultuous period during which former CEO Scott Thompson resigned after less than six months on the job over a controversy about his academic credentials. Yahoo co-founder Jerry Yang then resigned from the board and cut ties with the company.
Thompson's predecessor, the controversial and outspoken Carol Bartz, was fired over the phone for failing to deliver on growth. Yahoo's 2012 revenue was $US5 billion. It has been flat year over year, off from some $US6.3 billion in 2010.
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