diff --git a/build/lib.sh b/build/lib.sh
index 5409de581..f4de9c96f 100644
--- a/build/lib.sh
+++ b/build/lib.sh
@@ -33,7 +33,7 @@ GIT_VERSION=$(calculate_version)
 
 closure_opts="
   --language_in ECMASCRIPT5
-  --language_out ECMASCRIPT5
+  --language_out ECMASCRIPT3
 
   --jscomp_error=accessControls
   --jscomp_error=ambiguousFunctionDecl
diff --git a/build/wrapper.template.js b/build/wrapper.template.js
index 42604641e..f1ba595b7 100644
--- a/build/wrapper.template.js
+++ b/build/wrapper.template.js
@@ -1,5 +1,5 @@
 (function(){var g={};
-(function(window){%output%}.bind(g,this))();
+(function(window){%output%}.call(g,this));
 if (typeof(module)!="undefined"&&module.exports)module.exports=g.shaka;
 else if (typeof(define)!="undefined" && define.amd)define(function(){return g.shaka});
 else this.shaka=g.shaka;
diff --git a/lib/debug/log.js b/lib/debug/log.js
index 0dee0cf5b..23797735a 100644
--- a/lib/debug/log.js
+++ b/lib/debug/log.js
@@ -69,75 +69,45 @@ shaka.log.v1 = function() {};
 shaka.log.v2 = function() {};
 
 
-/**
- * @private
- * @param {string} logName
- */
-shaka.log.patchConsole_ = function(logName) {
-  var nop = function() {};
-  var logFunction = console[logName];
+// IE8 has no console unless it is opened in advance.
+// IE9 console methods are not Functions and have no bind.
+if (window.console && window.console.log.bind) {
+  if (!COMPILED) {
+    /**
+     * Change the log level.  Useful for debugging in uncompiled mode.
+     *
+     * @param {number} level
+     */
+    shaka.log.setLevel = function(level) {
+      var nop = function() {};
+      var log = shaka.log;
+      var Level = shaka.log.Level;
 
-  if (!logFunction) {
-    console[logName] = nop;
-  } else if (!logFunction.bind) {
-    // IE 9 does not provide a .bind for the built-in logging functions.
-    console[logName] = function() {
-      logFunction.apply(console, arguments);
+      log.error = (level >= Level.ERROR) ? console.error.bind(console) : nop;
+      log.warning = (level >= Level.WARNING) ? console.warn.bind(console) : nop;
+      log.info = (level >= Level.INFO) ? console.info.bind(console) : nop;
+      log.debug = (level >= Level.DEBUG) ? console.log.bind(console) : nop;
+      log.v1 = (level >= Level.V1) ? console.debug.bind(console) : nop;
+      log.v2 = (level >= Level.V2) ? console.debug.bind(console) : nop;
     };
+  } else {
+    if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.ERROR) {
+      shaka.log.error = console.error.bind(console);
+    }
+    if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.WARNING) {
+      shaka.log.warning = console.warn.bind(console);
+    }
+    if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.INFO) {
+      shaka.log.info = console.info.bind(console);
+    }
+    if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.DEBUG) {
+      shaka.log.debug = console.log.bind(console);
+    }
+    if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.V1) {
+      shaka.log.v1 = console.debug.bind(console);
+    }
+    if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.V2) {
+      shaka.log.v2 = console.debug.bind(console);
+    }
   }
-};
-
-shaka.log.patchConsole_('error');
-shaka.log.patchConsole_('warn');
-shaka.log.patchConsole_('info');
-shaka.log.patchConsole_('log');
-shaka.log.patchConsole_('debug');
-
-if (!COMPILED) {
-  /**
-   * Change the log level.  Useful for debugging in uncompiled mode.
-   *
-   * @param {number} level
-   */
-  shaka.log.setLevel = function(level) {
-    var nop = function() {};
-    var log = shaka.log;
-    var Level = shaka.log.Level;
-
-    log.error = (level >= Level.ERROR) ? console.error.bind(console) : nop;
-    log.warning = (level >= Level.WARNING) ? console.warn.bind(console) : nop;
-    log.info = (level >= Level.INFO) ? console.info.bind(console) : nop;
-    log.debug = (level >= Level.DEBUG) ? console.log.bind(console) : nop;
-    log.v1 = (level >= Level.V1) ? console.debug.bind(console) : nop;
-    log.v2 = (level >= Level.V2) ? console.debug.bind(console) : nop;
-  };
-}
-
-
-// Although these bindings are redundant with setLevel() above, refactoring to
-// call a method here makes it so that the log messages themselves cannot be
-// compiled out.
-
-if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.ERROR) {
-  shaka.log.error = console.error.bind(console);
-}
-
-if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.WARNING) {
-  shaka.log.warning = console.warn.bind(console);
-}
-
-if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.INFO) {
-  shaka.log.info = console.info.bind(console);
-}
-
-if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.DEBUG) {
-  shaka.log.debug = console.log.bind(console);
-}
-
-if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.V1) {
-  shaka.log.v1 = console.debug.bind(console);
-}
-
-if (shaka.log.MAX_LOG_LEVEL >= shaka.log.Level.V2) {
-  shaka.log.v2 = console.debug.bind(console);
 }
diff --git a/lib/polyfill/fullscreen.js b/lib/polyfill/fullscreen.js
index 5527d09dd..d16eee02c 100644
--- a/lib/polyfill/fullscreen.js
+++ b/lib/polyfill/fullscreen.js
@@ -34,6 +34,11 @@ goog.provide('shaka.polyfill.Fullscreen');
  * @export
  */
 shaka.polyfill.Fullscreen.install = function() {
+  if (!window.Document) {
+    // Avoid errors on very old browsers.
+    return;
+  }
+
   var proto = Element.prototype;
   proto.requestFullscreen = proto.requestFullscreen ||
                             proto.mozRequestFullScreen ||
diff --git a/lib/polyfill/mediakeys.js b/lib/polyfill/mediakeys.js
index 685be0465..389b3e520 100644
--- a/lib/polyfill/mediakeys.js
+++ b/lib/polyfill/mediakeys.js
@@ -43,7 +43,13 @@ goog.require('shaka.polyfill.PatchedMediaKeys.v20140218');
 shaka.polyfill.MediaKeys.install = function() {
   shaka.log.debug('MediaKeys.install');
 
-  if (Navigator.prototype.requestMediaKeySystemAccess &&
+  if (!window.HTMLVideoElement) {
+    // Avoid errors on very old browsers.
+    return;
+  }
+
+  if (window.Navigator &&
+      Navigator.prototype.requestMediaKeySystemAccess &&
       MediaKeySystemAccess.prototype.getConfiguration) {
     shaka.log.info('Using native EME as-is.');
   } else if (HTMLMediaElement.prototype.webkitGenerateKeyRequest) {
diff --git a/lib/polyfill/patchedmediakeys_nop.js b/lib/polyfill/patchedmediakeys_nop.js
index 84aab809b..359e9f1d9 100644
--- a/lib/polyfill/patchedmediakeys_nop.js
+++ b/lib/polyfill/patchedmediakeys_nop.js
@@ -32,7 +32,7 @@ shaka.polyfill.PatchedMediaKeys.nop.install = function() {
   var nop = shaka.polyfill.PatchedMediaKeys.nop;
 
   // Install patches.
-  Navigator.prototype.requestMediaKeySystemAccess =
+  navigator.requestMediaKeySystemAccess =
       nop.requestMediaKeySystemAccess;
   // Delete mediaKeys to work around strict mode compatibility issues.
   delete HTMLMediaElement.prototype['mediaKeys'];
@@ -57,7 +57,7 @@ shaka.polyfill.PatchedMediaKeys.nop.install = function() {
 shaka.polyfill.PatchedMediaKeys.nop.requestMediaKeySystemAccess =
     function(keySystem, supportedConfigurations) {
   shaka.log.debug('PatchedMediaKeys.nop.requestMediaKeySystemAccess');
-  shaka.asserts.assert(this instanceof Navigator);
+  shaka.asserts.assert(this == navigator);
 
   return Promise.reject(new Error(
       'The key system specified is not supported.'));
diff --git a/lib/polyfill/videoplaybackquality.js b/lib/polyfill/videoplaybackquality.js
index 4456079f8..b407e37ae 100644
--- a/lib/polyfill/videoplaybackquality.js
+++ b/lib/polyfill/videoplaybackquality.js
@@ -33,6 +33,11 @@ goog.provide('shaka.polyfill.VideoPlaybackQuality');
  * @export
  */
 shaka.polyfill.VideoPlaybackQuality.install = function() {
+  if (!window.HTMLVideoElement) {
+    // Avoid errors on very old browsers.
+    return;
+  }
+
   var proto = HTMLVideoElement.prototype;
   if (proto.getVideoPlaybackQuality) {
     // No polyfill needed.