Browser plugins are small programs that enhance your browser. For example, the Flash plugin allows you to play Flash games and watch video on sites like YouTube, and the Adobe Reader plugin lets you open PDFs in your browser.
As with any software, it's crucial that you keep your plugins up-to-date. Plugins are often updated to fix security flaws or add functionality. Many plugins, like Java, will automatically ask you to update them, so this is an easy way to keep things current. Unfortunately, not all of them take the automated approach.
You could go to the website of each plugin to get the latest version, but I suggest you save some time by using Mozilla's Plugin Check. Visit the site, give it a few seconds to check your plugins, then update any that are out of date.
As always, contact OptimWise for more information or assistance!