Hello, I've had firefox for awhile now and I was used to the updates, but for some reason Firefox has ceased updating for me and I am stuck on version 19, I have attempted uninstalling and reinstalling which is what was suggested when I looked through for an answer.

When I do uninstall and reinstall even though it tells me its updating to the 22nd version it reverts directly back to 19. I know it is not updating because one of the websites I visit tells me if my browser is not updated to its latest version and prevents me for getting certain tasks done, when I contacted an administrator they told me Firefox was still on its 19th version on my computer. I'm not exactly sure what the problem is, any ideas?