[InclinedPlane]

The marketshare in the general public (the 5%) is almost inconsequential. The general public doesn't build websites for a living. The marketshare amongst tech professionals is more significant, and there Chrome's numbers are much higher. More so, Chrome's marketshare, even among the general public, is growing quickly, only a fool would ignore the significance of that.

Also, marketshare is not necessarily the primary motivator for every developer. A lot of the Firefox developers are motivated to put the best browser possible out there, regardless of marketshare, the fact that there is a leaner, meaner, faster browser even exists (even if the marketshare was less than 1%) might be enough motivation for them to innovate.