I can't say I'm surprised about this as most people I know have switched from Firefox to Chrome. It seems like in recent years Firefox has lost focus of what its goal was.
"Mozilla today announced it is abandoning the Metro version of its Firefox browser, before the first release for Windows 8 even sees the light of day. Firefox Vice President Johnathan Nightingale ordered the company's engineering leads and release managers to halt development earlier this week, saying that shipping a 1.0 version "would be a mistake." Mozilla says it simply does not have the resources nor the scale of its competitors, and it has to pick its battles. The Metro platform (which has since been renamed to Modern UI, but many prefer the older name) simply doesn't help the organization achieve its mission as well as other platforms Firefox is available for: Windows, Mac, Linux, and Android."
