Comment #3 on issue 1030 by arritrancos: Ubuntu 10.04, Firefox 3.6.12: "Google Gears" could not be installed because it is not compatible with your Firefox build type (Linux_x86-gcc3)
http://code.google.com/p/gears/issues/detail?id=1030
Same problem on ubuntu 10.10 with firefox 3.6.12
