A US senate committee has confirmed it will hold a preliminary inquiry into Mozilla's complaint that Microsoft's Windows 8 operating system will not support other browsers in the Windows RT and Windows on ARM versions of the system.
Mozilla made the complaint last week, claiming that the inability to run other browsers was in violation of its agreement with authorities over the introduction of a browser ballot system within the Windows operating system to avoid prior anti-competition concerns.
"Windows on ARM - as currently designed - restricts user choice, reduces competition and chills innovation," Mozilla general counsel Harvey Anderson wrote in a company blog post last week.
"By allowing only IE to perform the advanced functions of a modern web browser, third-party browsers are effectively excluded from the platform."
A spokesperson for the Senate Judiciary Committee has since confirmed that it will investigate the facts around the case, although stressed that there is no plan for an official hearing at present.
V3 contacted Mozilla for comment on the development but had received no reply at time of publication while Microsoft declined to comment.
Google also backed Firefox's claims last week, as the search giant continues to battle with Microsoft for dominance in numerous areas, including attempting to end Internet Explorer's (IE) market dominance with its Chrome browser.
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