diff --git a/include/canvas.js b/include/canvas.js
index cee1dc1..d131564 100644
--- a/include/canvas.js
+++ b/include/canvas.js
@@ -770,8 +770,8 @@ function getKeysym(e) {
         case 186       : keysym = 59; break; // ;  (IE)
         case 187       : keysym = 61; break; // =  (IE)
         case 188       : keysym = 44; break; // ,  (Mozilla, IE)
-        case 109       :                     // -  (Mozilla)
-            if (Util.Engine.gecko) {
+        case 109       :                     // -  (Mozilla, Opera)
+            if (Util.Engine.gecko || Util.Engine.presto) {
                          keysym = 45; }
                                       break;
         case 189       : keysym = 45; break; // -  (IE)
diff --git a/include/websock.js b/include/websock.js
index 4901faf..b9f52d7 100644
--- a/include/websock.js
+++ b/include/websock.js
@@ -169,7 +169,7 @@ function flush() {
     if (websocket.bufferedAmount !== 0) {
         Util.Debug("bufferedAmount: " + websocket.bufferedAmount);
     }
-    if (websocket.bufferedAmount < 1000) {
+    if (websocket.bufferedAmount < api.maxBufferedAmount) {
         //Util.Debug("arr: " + arr);
         //Util.Debug("sQ: " + sQ);
         if (sQ) {
@@ -281,6 +281,9 @@ function close() {
 }
 
 function constructor() {
+    // Configuration settings
+    api.maxBufferedAmount = 200;
+
     // Direct access to send and receive queues
     api.get_sQ       = get_sQ;
     api.get_rQ       = get_rQ;