diff --git a/openvidu-browser/src/main/resources/ts/OpenVidu/Session.ts b/openvidu-browser/src/main/resources/ts/OpenVidu/Session.ts
index a6c5e3f7..babb3168 100644
--- a/openvidu-browser/src/main/resources/ts/OpenVidu/Session.ts
+++ b/openvidu-browser/src/main/resources/ts/OpenVidu/Session.ts
@@ -229,7 +229,17 @@ export class Session {
     }
 
     unsuscribe(stream) {
-
+        console.log("Unsubscribing from " + stream.getId());
+        this.openVidu.sendRequest('unsubscribeFromVideo', {
+            sender: stream.getId()
+        },
+            function (error, response) {
+                if (error) {
+                    console.error(error);
+                } else {
+                    console.info("Unsubscribed correctly from " + stream.getId());
+                }
+            });
     }
 
     onParticipantPublished(options) {
@@ -462,18 +472,7 @@ export class Session {
             });
 
         } else {
-
-            console.log("Unsubscribing from " + stream.getId());
-            this.openVidu.sendRequest('unsubscribeFromVideo', {
-                sender: stream.getId()
-            },
-                function (error, response) {
-                    if (error) {
-                        console.error(error);
-                    } else {
-                        console.info("Unsubscribed correctly from " + stream.getId());
-                    }
-                });
+            this.unsuscribe(stream);
         }
     }
 
diff --git a/openvidu-browser/src/main/resources/ts/OpenViduTokBox/OpenViduTokBox.ts b/openvidu-browser/src/main/resources/ts/OpenViduTokBox/OpenViduTokBox.ts
index c6d78516..eb7e666c 100644
--- a/openvidu-browser/src/main/resources/ts/OpenViduTokBox/OpenViduTokBox.ts
+++ b/openvidu-browser/src/main/resources/ts/OpenViduTokBox/OpenViduTokBox.ts
@@ -74,11 +74,16 @@ export class OpenViduTokBox {
     checkSystemRequirements(): number {
         let browser = adapter.browserDetails.browser;
         let version = adapter.browserDetails.version;
-        if ((version == null) && ((browser != 'chrome') && (browser != 'firefox') && (browser != 'edge') && (browser != 'safari'))) {
-            return 0;
-        } else {
+
+        //Bug fix: 'navigator.userAgent' in Firefox for Ubuntu 14.04 does not return "Firefox/[version]" in the string, so version returned is null
+        if ((browser == 'firefox') && (version == null)) {
             return 1;
         }
+        if (((browser == 'chrome') && (version >= 28)) || ((browser == 'edge') && (version >= 12)) || ((browser == 'firefox') && (version >= 22))) {
+            return 1;
+        } else {
+            return 0;
+        }
     }
 
     getDevices(callback) {
diff --git a/openvidu-browser/src/main/resources/ts/OpenViduTokBox/SessionTokBox.ts b/openvidu-browser/src/main/resources/ts/OpenViduTokBox/SessionTokBox.ts
index 149fce76..024ab800 100644
--- a/openvidu-browser/src/main/resources/ts/OpenViduTokBox/SessionTokBox.ts
+++ b/openvidu-browser/src/main/resources/ts/OpenViduTokBox/SessionTokBox.ts
@@ -3,6 +3,7 @@ import { Stream } from '../OpenVidu/Stream';
 
 import { OpenViduTokBox } from './OpenViduTokBox';
 import { PublisherTokBox } from './PublisherTokBox';
+import { SubscriberTokBox } from './SubscriberTokBox';
 
 export class SessionTokBox {
 
@@ -90,13 +91,18 @@ export class SessionTokBox {
         }
     }
 
-    subscribe(stream: Stream, htmlId: string, videoOptions: any);
-    subscribe(stream: Stream, htmlId: string);
+    subscribe(stream: Stream, htmlId: string, videoOptions: any): SubscriberTokBox;
+    subscribe(stream: Stream, htmlId: string): SubscriberTokBox;
     
-    subscribe(param1, param2, param3?) {
+    subscribe(param1, param2, param3?): SubscriberTokBox {
         // Subscription
         this.session.subscribe(param1);
         param1.playOnlyVideo(param2, null);
+        return new SubscriberTokBox(param1, param2);
+    }
+
+    unsuscribe(subscriber: SubscriberTokBox) {
+        this.session.unsuscribe(subscriber.stream);
     }