Rated 5 out of 5 stars
It dose help do:
# Type "about:config" into Firefox's address bar and click the "I'll be careful, I promise!" button.
# Right-click anywhere. Choose New>Boolean. Make the name of your new config value "extensions.checkCompatibility" and set it to "false".
# Make another new boolean pair called "extensions.checkUpdateSecurity" and set the value to "false".
# Restart Firefox.