-added firefox role

-attempt again to disable screensaver

roles/common/files/lxqt-powermanagement.conf

@@ -0,0 +1,15 @@
+[General]
+__userfile__=true
+backlightIdleness=0
+backlightIdlenessOnBatteryDischarging=true
+disableIdlenessWhenFullscreen=false
+enableBatteryWatcher=false
+enableIdlenessBacklightWatcher=false
+enableIdlenessWatcher=false
+enableLidWatcher=false
+idlenessACAction=-1
+idlenessACTime=@Variant(\0\0\0\xf\0\r\xbb\xa0)
+idlenessBatteryAction=-1
+idlenessBatteryTime=@Variant(\0\0\0\xf\0\r\xbb\xa0)
+idlenessTime=@Variant(\0\0\0\xf\0\0\x3\xe8)
+runCheckLevel=1