Older versions of the Java Deployment Toolkit (DT) and the Java Plugin have been disabled by Firefox.
Some Java versions are flagged by Firefox as 'Add-ons may be causing problems'.
CLDC runs on top of Sun's K Virtual Machine (KVM) that is provided as part of this release.
Mozilla maintains Firefox ESR Releases for approximately one year.
Developers and users still relying on the Java plugin technology in the 32-bit Mozilla Firefox web browser should consider migrating to a different solution.
If Firefox thinks an add-on is unsafe and can cause a security risk, it will block it from loading.
In case of a soft block Firefox will present a warning message but will allow the user to continue if they wish but with compromised security.