I'm using 52 ESR, the last version that will ever support npapi. 52 non-ESR already blocks it. The only other thing I noticed is that the packaged x2goserver is a different version than the plugin and plugin-provider. Packages for other distros all match to 4.1.0. Does the x2go server version have to match the plugin and plugin-provider version? On Mon, May 8, 2017 at 1:14 PM, Ulrich Sibiller wrote: > AFAIK npapi plugin support has been removed in Firefox 52 so the x2go > plugin will not work anymore. > > Uli > > Vom Smartphone gesendet. > ------------------------------ > Von: Justin St. Marie > Gesendet: ‎08.‎05.‎2017 17:33 > An: submit@bugs.x2go.org > Betreff: [X2Go-Dev] Bug#1170: x2goplugin / x2goplugin-provider Failed > toconnect: Permission denied > > Package: x2goserver > Version: 4.0.1.20-1.el7.x86_64 > > Package: x2goplugin-provider > Version: 4.1.0.0-1.el7.x86_64 > > Package: x2goplugin > Version: 4.1.0.0-1.el7.x86_64 > > All packages are from the official EPEL 7 repository. > > When trying to log in using the firefox plugin, the error is: Failed to > connect: Permission denied. The same credentials work with the x2go client. > > I used the example X2Go Demo config file, only changing server=IPaddress. >