If you're using a certain website to view content like videos, games, or web pages that have flash content, you might encounter the following error when browsing those websites:

Missing plugin

This is caused by the website using an old version of Flash, and the plugin it's using is no longer available on your computer. In the case of Flash videos, this is usually caused by a bug on the website itself that results in the website not downloading the right version of Flash. If you're using Chrome, you can try updating to the latest version. If you're using Internet Explorer, you can try using the latest version of the browser.

If the plugin is missing, the website will not be able to view the content. You can then try installing it. 

Using this "Missing Plug-in" Fix Chrome app, you will be able to fix this error. So make sure you have the latest version of this extension.