Direct in-browser access to the ProxySG or Advanced Secure Gateway (ASG) Management Console fails with messages "browser no longer supports the NPAPI plug-in" or "This Plugin is not supported".
Access to the ProxySG or Advanced Secure Gateway Management Console fails with messages "browser no longer supports the NPAPI plug-in" or "This Plugin is not supported".
NPAPI plugin support is required when a browser accesses the ProxySG Management Console or the Proxy tab in the ASG Management Console directly. Some browsers, such as Google Chrome and Mozilla Firefox, have removed support for the NPAPI plugin.
Refer to following for the status of the NPAPI plugin support amongst browser versions:
Note: Symantec supports browsers unaffected by NPAPI plugin removal that can access the Management Console directly. See Supported Java, operating system, and browser versions for SGOS and Advanced Secure Gateway
A transition from direct, in-browser access, to using Java Web Start for all Management Console activities. Doing so ensures that any future changes in browser behavior will not impact Management Console accessibility. For details on using Java Web Start, see Download the Management Console Launcher JNLP file to launch multiple Management Consoles
Use the appropriate workaround if the Management Console must be accessed directly using a browser that has removed or disabled support for the NPAPI plugin.
If you are currently running Google Chrome version 42 through 44
NPAPI plugin support was disabled by default in versions 42 through 44.
To enable NPAPI plugin support:
If you are currently running Mozilla Firefox version 52
NPAPI plugin support was disabled by default in version 52.
To enable NPAPI plugin support :
NOTE: NPAPI support in Firefox ESR version 52 is not currently compatible with the ProxySG or Advanced Secure Gateway Management Console.