how to I stop Firefoc continually trying to get me download an update 8.1 that my computer didn't seem to like so I uninstalled

I was invited to upgrade to Firefox 8.1 but my old computer decided it didn't like it & kept messing up so I uninstalled it. Now Firefox 8.1 is continually popping up for me to download & is frankly a blinking nuisance. How do I get it to stop doing this?