The following are the system requirements for installing the JDK and the JRE on macOS:
Install Java Plugin Firefox Mac Os X Catalina
Enable Java Plugin Firefox
Bug report submitted to Apple (rdar://10444452) Latest Java updates access plugin instance after destruction, crash FF 8 As of Apple's latest Java updates (Java for Mac OS 10.6 Update 6 and Java for Mac OS X Lion Update 1), Apple's Java plugin can call an NPAPI function on a plugin instance after the plugin instance has been destroyed. I guess Java Plugins just are problematic in Mac OS X 10.3.9 and I won't be able to view some content at certain sites. Mac Support Specialist: Daniel, Mac Genius replied 10 years ago That will probably be the case, however look here MacUpdate: Download Apple Mac Software & iPhone Software there may be some plugins that I am not aware of for. As far as I knew, it was impossible to get Firefox to use the latest Java VM installed in Panther (1.4.2) - it always defaulted to Java 1.3.1. But happily, it turns out that I was wrong. Yesterday I stumbled across a set of plugins that make that happen. If you have not yet installed Apple's Java OS X 2012-006 update, then you are still using a version of Apple Java 6 that includes the plug-in and the Java Preferences app. See 'Note for Users of OS X that Include Apple Java 6 Plug-in'. There can be multiple JDKs installed on a system, as many as you wish. The Java Embedding Plugin is a utility that allows other web browsers than Apple's Safari to use the most recent versions of Java on Mac OS X. When used together with an updated version of Mozilla's MRJ Plugin Carbon (included in this distribution), the Java Embedding Plugin's functionality is currently available to recent versions of Firefox.
Any Intel-based computer running macOS.
Administrator privileges.
You cannot install Java for a single user. Installing the JDK and JRE on macOS is performed on a systemwide basis for all users. Administrator privileges are required to install the JDK and JRE on macOS.
When you install the JDK, it also installs the JRE. However, the system will not replace the current JRE with a lower version.
To determine the current JRE version installed on your system, see Determining the JRE Version Installed on macOS. To install an earlier version of the JRE, you must first uninstall the current version. See Uninstalling the JRE on macOS.
When you install the JRE, you can install only one JRE on your system at a time. The system will not install a JRE that has an earlier version than the current version.
To determine the current JRE version installed on your system, see Determining the JRE Version Installed on macOS. To install an earlier version of the JRE, you must first uninstall the current version. See Uninstalling the JRE on macOS.
Note:
Installing a JRE from Oracle will not update
java -versionsymlinks or addjavato your path. To do this, you must install the JDK.