diff --git a/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBasicBrowser.java b/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBasicBrowser.java
index ffb96832c71..929991ad67c 100644
--- a/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBasicBrowser.java
+++ b/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBasicBrowser.java
@@ -133,6 +133,7 @@ public class ERXBasicBrowser extends ERXBrowser {
 
     private final boolean         _isRobot;
     private final boolean         _isICab;
+    private final boolean         _isEdge;
     private final boolean         _isIE;
     private final boolean         _isNetscape;
     private final boolean         _isOmniWeb;
@@ -147,6 +148,10 @@ public class ERXBasicBrowser extends ERXBrowser {
     private final boolean         _isMozillaVersion45;
     private final boolean         _isMozillaVersion40;
 
+    private final boolean         _isVersion13;
+    private final boolean         _isVersion12;
+    private final boolean         _isVersion11;
+    private final boolean         _isVersion10;
     private final boolean         _isVersion9;
     private final boolean         _isVersion8;
     private final boolean         _isVersion7;
@@ -187,6 +192,7 @@ public ERXBasicBrowser(String browserName, String version, String mozillaVersion
         _isRobot = _browserName.equals(ROBOT);
         _isICab = _browserName.equals(ICAB);
         _isIE = _browserName.equals(IE);
+        _isEdge = _browserName.equals(EDGE);
         _isNetscape = _browserName.equals(NETSCAPE);
         _isOmniWeb = _browserName.equals(OMNIWEB);
         _isOpera = _browserName.equals(OPERA);
@@ -205,6 +211,10 @@ public ERXBasicBrowser(String browserName, String version, String mozillaVersion
 
         
         String normalizedVersion = ERXStringUtilities.removeExtraDotsFromVersionString(_version);
+        _isVersion13 = normalizedVersion.startsWith("13.");
+        _isVersion12 = normalizedVersion.startsWith("12.");
+        _isVersion11 = normalizedVersion.startsWith("11.");
+        _isVersion10 = normalizedVersion.startsWith("10.");
         _isVersion9 = normalizedVersion.startsWith("9.");
         _isVersion8 = normalizedVersion.startsWith("8.");
         _isVersion7 = normalizedVersion.startsWith("7.");
@@ -306,6 +316,11 @@ public boolean isICab() {
         return _isICab;
     }
 
+    @Override
+    public boolean isEdge() {
+        return _isEdge;
+    }
+
     @Override
     public boolean isIE() {
         return _isIE;
diff --git a/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBrowser.java b/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBrowser.java
index 4d0565d434a..dcedd323687 100644
--- a/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBrowser.java
+++ b/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBrowser.java
@@ -89,6 +89,7 @@ public abstract class ERXBrowser implements NSKeyValueCoding {
 
     public static final String ROBOT 	= "robot";
     public static final String ICAB 	= "iCab";
+    public static final String EDGE		= "Edge";
     public static final String IE		= "IE";
     public static final String NETSCAPE = "Netscape";
     public static final String OMNIWEB 	= "OmniWeb";
@@ -240,6 +241,20 @@ public abstract class ERXBrowser implements NSKeyValueCoding {
      *         <div class="ja">iCab の場合には true が戻ります</div>
      */
     public abstract boolean isICab();
+    
+    /**
+     * <div class="en">
+     * Browser is Microsoft Edge?
+     * </div>
+     
+     * <div class="ja">
+     * ブラウザは Microsoft Edge ですか？
+     * </div>
+     * 
+     * @return <div class="en">true if browser is Edge.</div>
+     *         <div class="ja">Edge の場合には true が戻ります</div>
+     */
+    public abstract boolean isEdge();
 
     /**
      * <div class="en">
diff --git a/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBrowserFactory.java b/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBrowserFactory.java
index 4d0f763ff17..53c56e02201 100644
--- a/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBrowserFactory.java
+++ b/Frameworks/Core/ERExtensions/Sources/er/extensions/appserver/ERXBrowserFactory.java
@@ -587,8 +587,9 @@ public String parseBrowserName(String userAgent) {
         String browserString = _browserString(userAgent);
         String browser  = ERXBrowser.UNKNOWN_BROWSER;
         if (isRobot(browserString)) 						browser  = ERXBrowser.ROBOT;
+        else if (browserString.indexOf("Edge") > -1) 		browser  = ERXBrowser.EDGE;
         else if (browserString.indexOf("Chrome") > -1) 		browser  = ERXBrowser.CHROME;
-        else if (browserString.indexOf("MSIE") > -1) 		browser  = ERXBrowser.IE;
+        else if (browserString.indexOf("MSIE") > -1 || browserString.indexOf("Trident") > -1)	browser  = ERXBrowser.IE;
         else if (browserString.indexOf("Safari") > -1) 		browser  = ERXBrowser.SAFARI;
         else if (browserString.indexOf("Firefox") > -1) 	browser  = ERXBrowser.FIREFOX;
         else if (browserString.indexOf("OmniWeb") > -1)		browser  = ERXBrowser.OMNIWEB;
@@ -919,7 +920,21 @@ private String _versionString(String userAgent) {
         	if (startpos > -1)  {
         		versionString = userAgent.substring(startpos);
         	} else {
-        		versionString = _browserString(userAgent);
+        		startpos = userAgent.indexOf("rv:");
+            	if (startpos > -1)  {
+            		versionString = userAgent.substring(startpos);
+            		int endpos = versionString.indexOf(')');
+            		if (endpos > -1) {
+            			versionString = versionString.substring(0, endpos);
+            		}
+            	} else {
+            		startpos = userAgent.indexOf("Edge/");
+                	if (startpos > -1)  {
+                		versionString = userAgent.substring(startpos);
+                	} else {
+                		versionString = _browserString(userAgent);
+                	}
+            	}
         	}
     	}