Chrome on Linux uses the system package manager to autoupdate. The current version of Chrome is 34. Chrome is on a six week release cycle, so your version num

Chrome on Linux uses the system package manager to autoupdate. The current version of Chrome is 34. Chrome is on a six week release cycle, so your version number indicates you haven't had a system update in something like (34-28)*6 = 36 weeks. Much of the software you're running has known security vulnerabilities.