diff --git a/JitsiConference.js b/JitsiConference.js
index 0e77a18b8..47cb8c164 100644
--- a/JitsiConference.js
+++ b/JitsiConference.js
@@ -5,6 +5,7 @@ var RTC = require("./modules/RTC/RTC");
 var XMPPEvents = require("./service/xmpp/XMPPEvents");
 var AuthenticationEvents = require("./service/authentication/AuthenticationEvents");
 var RTCEvents = require("./service/RTC/RTCEvents");
+var DSEvents = require("../../service/desktopsharing/DesktopSharingEventTypes");
 var EventEmitter = require("events");
 var JitsiConferenceEvents = require("./JitsiConferenceEvents");
 var JitsiConferenceErrors = require("./JitsiConferenceErrors");
@@ -867,6 +868,10 @@ function setupListeners(conference) {
         conference.eventEmitter.emit(JitsiConferenceEvents.MESSAGE_RECEIVED, id, txt, ts);
     });
 
+    conference.rtc.addListener(DSEvents.FIREFOX_EXTENSION_NEEDED, function (url) {
+        conference.eventEmitter.emit(JitsiConferenceEvents.FIREFOX_EXTENSION_NEEDED, url);
+    });
+
     conference.rtc.addListener(RTCEvents.DOMINANTSPEAKER_CHANGED, function (id) {
         if(conference.lastDominantSpeaker !== id && conference.room) {
             conference.lastDominantSpeaker = id;
diff --git a/JitsiConferenceEvents.js b/JitsiConferenceEvents.js
index b80d3f0dd..15d58986e 100644
--- a/JitsiConferenceEvents.js
+++ b/JitsiConferenceEvents.js
@@ -103,7 +103,12 @@ var JitsiConferenceEvents = {
     /**
      * Indicates that phone number changed.
      */
-    PHONE_NUMBER_CHANGED: "conference.phoneNumberChanged"
+    PHONE_NUMBER_CHANGED: "conference.phoneNumberChanged",
+    /**
+     * Indicates that to proceed with screen sharing
+     * browser extension must be installed first.
+     */
+    FIREFOX_EXTENSION_NEEDED: "conference.firefoxExtensionRequired"
 };
 
 module.exports = JitsiConferenceEvents;
diff --git a/doc/API.md b/doc/API.md
index a22ff89f5..5cce6c031 100644
--- a/doc/API.md
+++ b/doc/API.md
@@ -92,6 +92,7 @@ JitsiMeetJS.setLogLevel(JitsiMeetJS.logLevels.ERROR);
         - KICKED - notifies that user has been kicked from the conference.
         - START_MUTED_POLICY_CHANGED - notifies that all new participants will join with muted audio/video stream (parameters - JS object with 2 properties - audio(boolean), video(boolean))
         - STARTED_MUTED - notifies that the local user has started muted
+        - FIREFOX_EXTENSION_NEEDED - notifies that browser extension must be installed to proceed with screen sharing (parameters - extension url(string))
 
     2. connection
         - CONNECTION_FAILED - indicates that the server connection failed.
diff --git a/modules/RTC/RTC.js b/modules/RTC/RTC.js
index c158fa3b0..9b91c5b6d 100644
--- a/modules/RTC/RTC.js
+++ b/modules/RTC/RTC.js
@@ -6,8 +6,6 @@ var JitsiTrack = require("./JitsiTrack");
 var JitsiLocalTrack = require("./JitsiLocalTrack.js");
 var DataChannels = require("./DataChannels");
 var JitsiRemoteTrack = require("./JitsiRemoteTrack.js");
-var DesktopSharingEventTypes
-    = require("../../service/desktopsharing/DesktopSharingEventTypes");
 var MediaStreamType = require("../../service/RTC/MediaStreamTypes");
 var RTCEvents = require("../../service/RTC/RTCEvents.js");