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Computerworld - A Mozilla product director yesterday said that unless Microsoft allows other browser makers to call important APIs in Windows RT, it is "probably not worth it to even bother" building a version of Firefox for the new operating system.
In a Wednesday post to his personal blog, Asa Dotzler, product director of Firefox, again slammed Microsoft for not allowing third-party browsers access to Win32 APIs, or application programming interfaces, in the upcoming Windows RT.
Windows RT, once called Windows on ARM, or WOA, is the operating system Microsoft is developing for devices -- tablets primarily, but also lightweight laptops -- that rely on processors designed for the ARM architecture.
"If we built Firefox for Windows ARM Metro, we would not have access to those powerful Win32 APIs and so we would be at an extreme disadvantage when compared to IE10 for Metro," said Dotzler yesterday, referring to Microsoft's own browser, which will be able to call the banned APIs.
"We could build a beautiful Firefox that looked really nice on Metro, but Firefox would be so crippled in terms of power and speed that it's probably not worth it to even bother," Dotzler added. "No sane user would want to surf today's Web and use today's modern websites with that kind of crippled browser."
Although Dotzler's "not worth it" comment may hint at the likelihood that Mozilla will step away from Windows RT, it is not the company's official position.
Last week, Harvey Anderson, Mozilla's chief counsel, said that company engineers were "still evaluating the best course of action" to take with Windows RT.
Anderson and Dotzler took to the Web last week to publicly knock Microsoft for barring third-party developers access to the Win32 APIs in Windows RT, and for letting its own software, especially IE10, call those same APIs.
Under Microsoft's current rules for Windows RT, only IE10 will be allowed to call the APIs necessary to execute a JIT compiler.
"Without [a JIT compiler] modern websites like Facebook, Twitter and Gmail would be painfully slow for users, unusably slow [emphasis in original]," Dotzler said.
Microsoft originally had a similar restriction in place on Windows 8, the more traditional operating system for x86/64 processors like those made by Intel and AMD, but relaxed the API-access rules there in February.
At that time, Microsoft issued some basic documentation that put browsers in a special category on Windows 8, and showed how developers could access the Win32 APIs from Metro versions of their applications.
Mozilla and Google, which makes Chrome, have both said they will create a browser that runs in the Metro environment on Windows 8; those Metro-app versions will call the Win32 APIs from the traditional desktop side of the OS.
Originally published on www.computerworld.com. Click here to read the original story.