Firefox "Paste" dialog popping up with each click on RDP sessions

[ora2j]

Describe the bug
When clicking anywhere in the remote machine's screen area, a firefox context menu with only the "paste" option appears under the cursor.

To Reproduce
Steps to reproduce the behavior:

1. Connect to a RDP session using firefox on any remote machine.
2. Click anywhere on the screen

Expected behavior
Nothing should appear.

Screenshots

Server Software (please complete the following information):

• OS: Windows
• Meshcentral config :

{
   "settings":{
	  "cert": "meshcentral.mydomain.info",
      "minify":true,
      "_lanonly":true,
	  "_wanonly":true,
      "sessionkey":"mykey",
      "port":444,
      "aliasport":443,
      "redirport":81,
      "rediraliasport":80,
      "selfupdate":true,
      "clickonce":true,
      "agentpong":300,
      "webrtc":true,
      "tlsoffload":"192.168.1.55",
      "allowframing":true,
      "nice404":true,
      "allowHighQualityDesktop":true,
      "localdiscovery":{
         "name":"R710",
         "info":"VAFE's main Server"
      }
   },
   "domains":{
      "":{
         "certUrl":"https://meshcentral.mydomain.info",
         "title":"Meshcentral",
		 "allowedOrigin":true,
         "title2":"@mydomain.info",
         "footer":"Contact : VAFE@mydomain.info",
		 "agentConfig": [ "webSocketMaskOverride=1" ],
         "newAccounts":false,
         "agentCustomization":{
            "displayName":"VAFE's server MeshAgent",
            "description":"Meshcentral agent for VAFE's Main meshcentral server",
            "companyName":"Meshcentral Vafe",
            "serviceName":"VAFE's MeshAgent",
            "fileName":"Meshagent"
         }
      }
  }
}

[si458]

fixed, will be out in next release