On PCLinux0S 2009. I just tried to open Oracle R12 from firefox 3.0.7 and it worked fine.
I did get this message
In order to access this application, you must install the J2SE Plugin version 1.6.0_07 on your client and NPX_PLUGIN_PATH environment variable is set before starting Netscape. To install this plugin, click here to download the oaj2se.exe executable. Once the download is complete, double-click the oaj2se.exe file to install the plugin. You will be prompted to restart your browser when the installation is complete.
But it worked fine.
But on Oracle Linux 5 (ironic).
I get the same message but the form does not open.
I have Firefox 3.0.7 on PClinux 0S and Java TM Plug-in 1.6.0_12-b04.
On Oracle Linux 5 I have Firefox 3.6.13 I can not find Java TM Plug in.
Any ideas why?