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Senate to look at Mozilla's browser competition allegations

Sen. Herb Kohl's office to examine Mozilla's complaint against Microsoft over browser API access in Windows RT

The U.S. Senate Judiciary Committee will look into accusations by Mozilla that Microsoft is restricting access to important programming tools for browsers that will run in Windows RT, a political blog reported Friday.

The Hill cited unnamed aides to Sen. Herb Kohl (D-Wis.), the chairman of the Subcommittee on Antitrust, Competition Policy, and Consumer Rights, as the source for its report.

Last week, Mozilla, the maker of Firefox, said Microsoft was withholding access to APIs -- application programming interfaces -- that Mozilla considers crucial for building a browser that can compete with Microsoft's own Internet Explorer 10 (IE10) on ARM devices.

Although IE10 will have access to those APIs in Windows RT, rival browsers, including Firefox, will not. Mozilla argued that access to the Win32 APIs were necessary to develop a version of Firefox that could render JavaScript quickly, as well as to isolate plug-ins and tabs to make the browser more secure from exploits and more stable overall.

In a blog post last week, Harvey Anderson, Mozilla's chief counsel, raised the antitrust flag, saying that Microsoft's blocking of the APIs "seems to represent the very behavior the [Department of Justice]-Microsoft settlement sought to prohibit."

Microsoft is no longer under U.S. government scrutiny in the wake of the landmark 1998 antitrust case, but the eventual settlement required Microsoft to share its APIs with third-party vendors. Microsoft has repeatedly promised to continue that sharing.

In answer to follow-up questions Friday, however, Anderson seemed to back away from any legal recourse. "We think the most effective way to resolve this is through critical discussion and transparency of the issues rather than through legal action," he said.

Google has said it shares Mozilla's concern over the Windows RT browser situation.

Microsoft has declined to comment on Mozilla's accusations.

Kohl's office was unavailable for comment Sunday.

Gregg Keizer covers Microsoft, security issues, Apple, Web browsers and general technology breaking news for Computerworld. Follow Gregg on Twitter at @gkeizer, on Google+ or subscribe to Gregg's RSS feed. His email address is [email protected].

See more by Gregg Keizer on Computerworld.com.

Read more about browsers in Computerworld's Browsers Topic Center.

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