Google antitrust: European officials said Monday that they have found four areas of concern over Google’s search practices, The Washington Post reported.

In a letter to Google Chairman Eric Schmidt, antitrust officials said that it appears that the firm displays links for its own services in a way that disadvantages the competition.

The letter also said the firm allegedly copied content such as reviews from other services without permission and made it hard to use its ad services on other platforms. E.U. antitrust official Joaquin Almunia has asked Schmidt for a response within “weeks.”

Cable companies team up on WiFi: Five of the country’s largest cable providers announced Monday that they will share access to over 50,000 hot spots across the country. The new network, called CableWiFi, is a joint project of Bright House Networks, Cablevision, Comcast, Cox Communications and Time Warner.

In a news release, the companies said the new network will let customers of any of the participating cable companies connect to the new network no matter where they are.

The companies currently have hot spots in and around New York City, Los Angeles, Tampa, Orlando and Philadelphia. The service will be free to broadband subscribers.

Yahoo to sell part of Alibaba: Yahoo has sold back its stake in the Chinese Web company Alibaba. The company announced Sunday that it had sealed the deal, selling much of its stake in Alibaba — a 20 percent share worth about $7.1 billion, according to a company news release.

The move comes shortly after the company lost its chief executive, Scott Thompson, who resigned after it was revealed that he had claimed a false computer science degree for years

Facebook falls in morning trading: Facebook fell sharply in morning trading to a price of $33.72, far below its initial public offering price of $38 per share.

The company’s highly anticipated offering failed to deliver the first-day pop that many analysts had expected, closing just 32 cents above its opening price. The stock’s opening was delayed because of technical glitches on the Nasdaq.

Nasdaq chief executive Bob Greifeld said that the stock exchange was “humbly embarrassed” by the glitches and that Nasdaq’s board met Saturday to discuss plans to change its IPO auction process. He called the first day of trading “successful,” the Associated Press reported.

The Securities and Exchange Commission said Friday that it would review the delays with Nasdaq to find the cause, The Washington Post reported.

Chrome overtakes IE: Google’s Chrome browser has taken the crown from Microsoft’s Internet Explorer as the most popular browser globally, according to the latest statistics from the analytics firm StatCounter.

Chrome had been steadily catching up to Microsoft’s browser, which has lost nearly 10 percent of its market share in the past year. Chrome was in third place behind IE and Mozilla’s Firefox as recently as last year but has grown quickly. In the United States, however, IE still has first place, with 54 percent of the market.