Amazon was the most-viewed site. (Creative Commons)

In-store shoppers spent $11.2 billion, around 2 percent less than last year, according to the Daily Beast.

Amazon.com was the most-viewed retail website. Wal-Mart Stores Inc. was second.

"Online has been around 9 percent of total holiday sales, but it could breach 10 percent for the first time this season," said Scot Wingo, chief executive of ChannelAdvisor, told Reuters.

It is unclear how online Black Friday sales will affect Cyber Monday, which has been the biggest e-commerce day in the past.

Reach Senior News Editor Hannah Madans here.