That way it never gets updated accidentally.
One of my colleagues created a script to remove the old firefox, and untar it on every run. open up your 'synaptic package manager' go to settings/repositories then other software,click on the canonical partners, then close and hit the reload button now type 'sun java6 plugin' mark it for installation and now hit apply. To enable or disable the Java plug-in Firefox: Open a new tab, and then, in the address bar, type about:addons.
This is possible on Windows computers, but Firefox for Mac defaults to 64-bit, making it impossible to install Java for Firefox on a /18.
to /usr/lib/mozilla/plugins, and url:about lugins show that it loads and activates java 1.5.0.