

Only one Java Plugin can be used at a time. In the remainder of this document, the text, "Firefox plugins directory", implies either of these locations. Alternatively, you can create the symbolic link in your home directory, in ~/.mozilla/plugins. To make the plugin available to all users, create the link inside of the Firefox application's directory, in the plugins subdirectory. If you want to use Java within Firefox, you need to manually create a symbolic link from the plugin file in the release to one of the locations that Firefox expects. When you install the Java platform, the Java plugin file is included as part of that install. For more information, see the Known Issues section of the JDK 8u191 release notes. The crash might also occur if the link was manually created for an earlier JRE and a user updates to JDK 8u191 or later releases.

Manually linking the Java plugin libraries to the Mozilla plugins directory may cause the Firefox browser to crash on Linux during startup, due to incompatibilities with 'glibc' versions in JDK 8u191 and later releases. Install Java Plugin Firefox Portable Version EXCLUSIVE
