One thing I can’t stand about any software is when it installs software I didn’t ask for, specially if it modifies another application. Extra hate points if it can’t be uninstalled.
This is the case of the Java run-time most people have installed in their Windows computer. Silently it installs a Java Console extension in Firefox which for some reason you can’t uninstall just by going to the Add-ons Manager, as the Uninstall button is disabled.
To enable it, close Firefox, right-click on the Firefox shortcut you usually click to launch it (or Shift + right-click if in Windows 7 task bar), and select Run as administrator…. Now you can go to the Add-ons Manager, press the Uninstall button, and restart Firefox to have one pest less in your computer.