Firefox Plugin Check site allows users to check if the browser plugins are up to date. Keeping your third-party plugins up to date helps Firefox run safely and smoothly. Firefox page check plugin also checks other latest browsers like Opera , Safari , Chrome , or IE 8 just in case you like to see if there are any outdated and potentially vulnerable plugins.
So how you do it ?
Just visit this page Firefox Plugin Check and the good thing is you can get the updated versions right from this firefox page.
You can also check this under firefox Addons ,click on Tools-Addons-Plugins-Check to see if your plugins are up to date. Most Firefox users are unaware of this cool feature.