Mozilla-firefox Plug Ins

Hi,when a plugin is necessary for MOZILLA and/or FIREFOX such as java,flash etc.,does the downloaded program install directly into the browser or is higher computer knowledge necessary to install the plugins?
What has to happen for the plugin to install correctly?
THANKS MUCH

 

Java can just be installed with the installer from http://www.java.com. Firefox will be able to find it just fine.

The Flash installer often can't find Firefox, but there's an "Other browsers" portion of the installed. Click the Browse button on that page, and point the directory selector to the plugins subdirectory for your Firefox installation (defaults to C:\Program Files\Firefox\plugins). Restart Firefox and Flash should work just fine.