

"Our developers have not been able to take advantage of new compiler features and have had to struggle to keep valuable optimizations from breaking, including having had to back out and ultimately delay some important new features like SPDY," said Dotzler in late January. And the company actually pulled the trigger two months ago, when Asa Dotzler, director of Firefox, explained the firm's reasoning. The decision wasn't a surprise: Mozilla has been discussing the change for at least three years. "This support change allows us to significantly improve Firefox performance on Windows by using a more modern build system," Mozilla said in a Friday post to a company blog. Firefox 12, set to ship April 24 and due to be replaced by the next edition on June 4, will be the last that supports the three older Windows.
