I want to know the answer to the following question:
Which two browsers promised to develop Metro-style versions of their browsers?
All the background I'm provided with is that "The developers of both Chrome and Firefox committed to developing Metro-style versions of their browsers; while Chrome's "Windows 8 mode" uses a full-screen version of the existing desktop interface, Firefox's version (which was first made available on the "Aurora" release channel in September 2013) uses a touch-optimized interface inspired by the Android version of Firefox.". Is that enough to answer the question?
Answer: yes