Reports have been confirmed that Firefox performance in Linux is considerably slower than in Windows or the Mac. So, why is Firefox performance slow in Linux? It seems to be a matter of priority. Less priority that is. Firefox developers have been focused on Windows, addressing issues where the majority of Firefox users are based.
Mozilla seemed to place less emphasis on Linux development. Mozilla is aware of these issues and are trying to fix them. Potentially, Canonical can replace Firefox with Chrome if performance continuous to be perceived as slow. Mozilla can potentially lose millions of dollars if this were to happen.
Mozilla receives millions of dollars from Google for making Google Search the default search engine for Firefox in Ubuntu. The growth of Firefox have slowed down considerably as Chrome continues to eat away the browser market share. I wouldn’t be surprised if Chrome becomes the default browser in the future, not only because of performance, but because it makes perfect sense.
After all, the Chrome browser is the centerpiece of the Chrome OS.