diff --git a/closure/goog/crypt/hash32.js b/closure/goog/crypt/hash32.js
index fdb99476cb..07224641e2 100644
--- a/closure/goog/crypt/hash32.js
+++ b/closure/goog/crypt/hash32.js
@@ -6,8 +6,6 @@
 
 /**
  * @fileoverview Implementation of 32-bit hashing functions.
- *
- * This is a direct port from the Google Java Hash class
  */
 
 goog.provide('goog.crypt.hash32');
@@ -17,7 +15,6 @@ goog.require('goog.crypt');
 
 /**
  * Default seed used during hashing, digits of pie.
- * See SEED32 in http://go/base.hash.java
  * @type {number}
  */
 goog.crypt.hash32.SEED32 = 314159265;
@@ -25,7 +22,6 @@ goog.crypt.hash32.SEED32 = 314159265;
 
 /**
  * Arbitrary constant used during hashing.
- * See CONSTANT32 in http://go/base.hash.java
  * @type {number}
  */
 goog.crypt.hash32.CONSTANT32 = -1640531527;
diff --git a/closure/goog/crypt/hash32_test.js b/closure/goog/crypt/hash32_test.js
index 12c2021bdb..34d224ddd2 100644
--- a/closure/goog/crypt/hash32_test.js
+++ b/closure/goog/crypt/hash32_test.js
@@ -19,9 +19,6 @@ const testSuite = goog.require('goog.testing.testSuite');
 
 // NOTE: This test uses a custom test case, see end of script block
 
-// Test data based on known input/output pairs generated using
-// http://go/hash.java
-
 function createByteArray(n) {
   const arr = [];
   for (let i = 0; i < n; i++) {
diff --git a/closure/goog/date/daterange.js b/closure/goog/date/daterange.js
index 91f5647de2..7821d93106 100644
--- a/closure/goog/date/daterange.js
+++ b/closure/goog/date/daterange.js
@@ -308,7 +308,8 @@ goog.date.DateRange.allTime = function(opt_today) {
 
 /**
  * Standard date range keys. Equivalent to the enum IDs in
- * DateRange.java http://go/datarange.java
+ * older versions of Guava's DateRange.
+ *
  *
  * @enum {string}
  */
diff --git a/closure/goog/disposable/idisposable.js b/closure/goog/disposable/idisposable.js
index 52db6af321..ac5fb041b1 100644
--- a/closure/goog/disposable/idisposable.js
+++ b/closure/goog/disposable/idisposable.js
@@ -28,7 +28,7 @@ goog.provide('goog.disposable.IDisposable');
  * to null as garbage collector will collect them assuming that references to
  * current object will be lost after it is disposed.
  *
- * See also http://go/mdn/JavaScript/Memory_Management.
+ * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Memory_Management
  *
  * @record
  */
diff --git a/closure/goog/dom/dom.js b/closure/goog/dom/dom.js
index ea1ac3177f..0937f56f49 100644
--- a/closure/goog/dom/dom.js
+++ b/closure/goog/dom/dom.js
@@ -2102,7 +2102,7 @@ goog.dom.isFocusableTabIndex = function(element) {
  * Enables or disables keyboard focus support on the element via its tab index.
  * Only elements for which {@link goog.dom.isFocusableTabIndex} returns true
  * (or elements that natively support keyboard focus, like form elements) can
- * receive keyboard focus.  See http://go/tabindex for more info.
+ * receive keyboard focus.
  * @param {Element} element Element whose tab index is to be changed.
  * @param {boolean} enable Whether to set or remove a tab index on the element
  *     that supports keyboard focus.
@@ -3330,7 +3330,7 @@ goog.dom.DomHelper.prototype.isFocusableTabIndex = goog.dom.isFocusableTabIndex;
  * Enables or disables keyboard focus support on the element via its tab index.
  * Only elements for which {@link goog.dom.isFocusableTabIndex} returns true
  * (or elements that natively support keyboard focus, like form elements) can
- * receive keyboard focus.  See http://go/tabindex for more info.
+ * receive keyboard focus.
  * @param {Element} element Element whose tab index is to be changed.
  * @param {boolean} enable Whether to set or remove a tab index on the element
  *     that supports keyboard focus.
diff --git a/closure/goog/dom/xml.js b/closure/goog/dom/xml.js
index e2b3b9afa5..b5d333168f 100644
--- a/closure/goog/dom/xml.js
+++ b/closure/goog/dom/xml.js
@@ -243,8 +243,7 @@ goog.dom.xml.createMsXmlDocument_ = function() {
   'use strict';
   var doc = new ActiveXObject('MSXML2.DOMDocument');
   if (doc) {
-    // Prevent potential vulnerabilities exposed by MSXML2, see
-    // http://b/1707300 and http://go/xxe-attacks for details.
+    // Prevent potential vulnerabilities exposed by MSXML2.
     doc.resolveExternals = false;
     doc.validateOnParse = false;
     // Add a try catch block because accessing these properties will throw an
diff --git a/closure/goog/editor/plugins/removeformatting.js b/closure/goog/editor/plugins/removeformatting.js
index e032a81818..5921f49dd4 100644
--- a/closure/goog/editor/plugins/removeformatting.js
+++ b/closure/goog/editor/plugins/removeformatting.js
@@ -624,7 +624,6 @@ goog.editor.plugins.RemoveFormatting.prototype.convertSelectedHtmlText_ =
  * browser's execCommand couldn't clobber without being totally inefficient.
  * Attempts to convert visual line breaks to BRs. Leaves anchors that contain an
  * href and images.
- * Adapted from Gmail's MessageUtil's htmlToPlainText. http://go/messageutil.js
  * @param {string} html The original html of the message.
  * @return {string} The unformatted html, which is just text, br's, anchors and
  *     images.
diff --git a/closure/goog/i18n/bidiformatter.js b/closure/goog/i18n/bidiformatter.js
index c3bd18a022..7202abb18e 100644
--- a/closure/goog/i18n/bidiformatter.js
+++ b/closure/goog/i18n/bidiformatter.js
@@ -7,7 +7,6 @@
 /**
  * @fileoverview Utility for formatting text for display in a potentially
  * opposite-directionality context without garbling.
- * Mostly a port of http://go/formatter.cc.
  */
 
 
diff --git a/closure/goog/i18n/charlistdecompressor.js b/closure/goog/i18n/charlistdecompressor.js
index b5340a1c53..09276ae04f 100644
--- a/closure/goog/i18n/charlistdecompressor.js
+++ b/closure/goog/i18n/charlistdecompressor.js
@@ -20,8 +20,6 @@
  * Value uses 0 based counting. That is value for the range [a, b] is 0 and
  * that of [a, c] is 1. Simillarly, the delta of "ab" is 0.
  *
- * Following python script can be used to compress character lists taken
- * standard input: http://go/charlistcompressor.py
  */
 
 goog.provide('goog.i18n.CharListDecompressor');
diff --git a/closure/goog/i18n/datetimeformat_test.js b/closure/goog/i18n/datetimeformat_test.js
index 49802d437d..22ac2a857c 100644
--- a/closure/goog/i18n/datetimeformat_test.js
+++ b/closure/goog/i18n/datetimeformat_test.js
@@ -85,13 +85,11 @@ function timezoneStringRFC(date) {
   return timeZone.getRFCTimeZoneString(date);
 }
 
-// Where could such data be found
-// In js_i18n_data in http://go/i18n_dir, we have a bunch of files with names
-// like TimeZoneConstant__<locale>.js
-// We strongly discourage you to use them directly as those data can make
-// your client code bloated. You should try to provide this data from server
-// in a selective manner. In typical scenario, user's time zone is retrieved
-// and only data for that time zone should be provided.
+// We strongly discourage you to use localization data for individual locales
+// directly as those data can make your client code bloated. You should try to
+// provide this data from server in a selective manner. In typical scenario,
+// user's time zone is retrieved and only data for that time zone should be
+// provided. Alternatively, consider the newer Intl APIs.
 const americaLosAngelesData = {
   'transitions': [
     2770,   60, 7137,   0, 11506,  60, 16041,  0, 20410,  60, 24777,  0,
diff --git a/closure/goog/i18n/messageformat.js b/closure/goog/i18n/messageformat.js
index 7a13b9b479..50f1af2219 100644
--- a/closure/goog/i18n/messageformat.js
+++ b/closure/goog/i18n/messageformat.js
@@ -23,8 +23,6 @@
  *
  * This is a subset of the ICU MessageFormatSyntax:
  *   http://userguide.icu-project.org/formatparse/messages
- * See also http://go/plurals and http://go/ordinals for internal details.
- *
  *
  * Message example:
  *
diff --git a/closure/goog/i18n/timezone_test.js b/closure/goog/i18n/timezone_test.js
index b885470606..3b2e7539fd 100644
--- a/closure/goog/i18n/timezone_test.js
+++ b/closure/goog/i18n/timezone_test.js
@@ -10,14 +10,11 @@ goog.setTestOnly();
 const TimeZone = goog.require('goog.i18n.TimeZone');
 const testSuite = goog.require('goog.testing.testSuite');
 
-// Where could such data be found
-// In js_i18n_data in http://go/i18n_dir, we have a bunch of files with names
-// like TimeZoneConstant__<locale>.js
-// We strongly discourage you to use them directly as those data can make
-// your client code bloated. You should try to provide this data from server
-// in a selective manner. In typical scenario, user's time zone is retrieved
-// and only data for that time zone should be provided.
-// This piece of data is in JSON format. It requires double quote.
+// We strongly discourage you to use localization data for individual locales
+// directly as those data can make your client code bloated. You should try to
+// provide this data from server in a selective manner. In typical scenario,
+// user's time zone is retrieved and only data for that time zone should be
+// provided. Alternatively, consider the newer Intl APIs.
 const americaLosAngelesData = {
   'transitions': [
     2770,   60, 7137,   0, 11506,  60, 16041,  0, 20410,  60, 24777,  0,
diff --git a/closure/goog/labs/mock/mock.js b/closure/goog/labs/mock/mock.js
index e6475658f4..d286d2d0a8 100644
--- a/closure/goog/labs/mock/mock.js
+++ b/closure/goog/labs/mock/mock.js
@@ -13,7 +13,6 @@
  * object (spying) and returning specific values for some or all the inputs to
  * methods (stubbing).
  *
- * Manual: http://go/goog.labs.mock
  */
 
 
diff --git a/closure/goog/labs/testing/environment.js b/closure/goog/labs/testing/environment.js
index ea3c61b4da..f06db18edf 100644
--- a/closure/goog/labs/testing/environment.js
+++ b/closure/goog/labs/testing/environment.js
@@ -25,7 +25,6 @@ goog.require('goog.testing.jsunit');
  * are instantiated and registered. During tearDown, the environments will
  * unwind the setUp and execute in reverse order.
  *
- * See http://go/jsunit-env for more information.
  */
 goog.labs.testing.Environment = goog.defineClass(null, {
   /** @constructor */
diff --git a/closure/goog/labs/useragent/test_agents.js b/closure/goog/labs/useragent/test_agents.js
index 18390a505f..22bc18b243 100644
--- a/closure/goog/labs/useragent/test_agents.js
+++ b/closure/goog/labs/useragent/test_agents.js
@@ -6,8 +6,7 @@
 
 /**
  * @fileoverview Various User-Agent strings.
- * See http://go/useragentexamples and http://www.useragentstring.com/ for
- * examples.
+ * See http://www.useragentstring.com/ for examples.
  */
 
 goog.module('goog.labs.userAgent.testAgents');
diff --git a/closure/goog/locale/genericfontnames.js b/closure/goog/locale/genericfontnames.js
index f0652263d4..c191880337 100644
--- a/closure/goog/locale/genericfontnames.js
+++ b/closure/goog/locale/genericfontnames.js
@@ -8,7 +8,6 @@
  * @fileoverview Functions to list locale-specific font list and generic name.
  * Generic name used for a font family would be locale dependent. For example,
  * for 'zh'(Chinese) users, the name for Serif family would be in Chinese.
- * Further documentation at: http://go/genericfontnames.
  */
 
 goog.provide('goog.locale.genericFontNames');
diff --git a/closure/goog/locale/locale.js b/closure/goog/locale/locale.js
index 6bb30f3c08..3ffe239407 100644
--- a/closure/goog/locale/locale.js
+++ b/closure/goog/locale/locale.js
@@ -158,9 +158,9 @@ goog.locale.getNativeCountryName = function(countryCode) {
  * Returns the localized country name for the provided language code in the
  * current or provided locale symbols set.
  *
- * This method depends on `goog.locale.LocaleNameConstants__<locale>` available
- * from http://go/js_locale_data. User of this method has to add dependency to
- * this.
+ * This method depends on `goog.locale.LocaleNameConstants__<locale>` available,
+ * which are not provided as part of Closure Library since this package is
+ * deprecated.  Users must manually add a workable dependency.
  *
  * @param {string} languageCode Language code to lookup the country name for.
  * @param {Object=} opt_localeSymbols If omitted the current locale symbol
@@ -181,9 +181,9 @@ goog.locale.getLocalizedCountryName = function(
  * Returns the localized country name for the provided language code in the
  * current or provided locale symbols set.
  *
- * This method depends on `goog.locale.LocaleNameConstants__<locale>` available
- * from http://go/js_locale_data. User of this method has to add dependency to
- * this.
+ * This method depends on `goog.locale.LocaleNameConstants__<locale>` available,
+ * which are not provided as part of Closure Library since this package is
+ * deprecated.  Users must manually add a workable dependency.
  *
  * @param {string} regionCode Two character country code or three digit region
  *      code to look up the country name for.
@@ -230,9 +230,9 @@ goog.locale.getNativeLanguageName = function(languageCode) {
  * Returns the localized language name for the provided language code in
  * the current or provided locale symbols set.
  *
- * This method depends on `goog.locale.LocaleNameConstants__<locale>` available
- * from http://go/js_locale_data. User of this method has to add dependency to
- * this.
+ * This method depends on `goog.locale.LocaleNameConstants__<locale>` available,
+ * which are not provided as part of Closure Library since this package is
+ * deprecated.  Users must manually add a workable dependency.
  *
  * @param {string} languageCode Language code to lookup the language name for.
  * @param {Object=} opt_localeSymbols locale symbol set if given.
@@ -428,7 +428,6 @@ goog.locale.getResourceWithFallback = function(resourceName, opt_locale) {
 
 
 // Export global functions that are used by the date time constants files.
-// See http://go/js_locale_data
 
 /**
  * Registers the LocaleNameConstants constants object for a given locale name.
diff --git a/closure/goog/locale/timezonefingerprint.js b/closure/goog/locale/timezonefingerprint.js
index 56d532c37e..60317f7f57 100644
--- a/closure/goog/locale/timezonefingerprint.js
+++ b/closure/goog/locale/timezonefingerprint.js
@@ -7,10 +7,7 @@
 /**
  * @fileoverview Data for time zone detection.
  *
- * The following code was generated by the timezone_detect.py script in:
- * http://go/i18n_tools which uses following files in this directory:
- * http://go/timezone_data
- * Files: olson2fingerprint.txt, country2olsons.txt, popular_olsons.txt
+ * The following code was generated by an internal tool.
  *
  * After automatic generation, we added some manual editing. Projecting on
  * future changes, it is very unlikely that we will need to change the time
diff --git a/closure/goog/locale/timezonelist.js b/closure/goog/locale/timezonelist.js
index 10f37589a1..2c68ed20b5 100644
--- a/closure/goog/locale/timezonelist.js
+++ b/closure/goog/locale/timezonelist.js
@@ -21,9 +21,9 @@ goog.require('goog.locale');
  * Returns the displayable list of short timezone names paired with its id for
  * the current locale, selected based on the region or language provided.
  *
- * This method depends on `goog.locale.TimeZone*__<locale>` available
- * from http://go/js_locale_data. Users of this method must add a dependency on
- * this.
+ * This method depends on `goog.locale.TimeZone*__<locale>` being available,
+ * which are not provided as part of Closure Library since this package is
+ * deprecated.  Users must manually add a workable dependency.
  *
  * @param {string=} opt_regionOrLang If region tag is provided, timezone ids
  *    specific this region are considered. If language is provided, all regions
@@ -45,9 +45,9 @@ goog.locale.getTimeZoneSelectedShortNames = function(opt_regionOrLang) {
  * Returns the displayable list of long timezone names paired with its id for
  * the current locale, selected based on the region or language provided.
  *
- * This method depends on `goog.locale.TimeZone*__<locale>` available
- * from http://go/js_locale_data. Users of this method must add a dependency on
- * this.
+ * This method depends on `goog.locale.TimeZone*__<locale>` being available,
+ * which are not provided as part of Closure Library since this package is
+ * deprecated.  Users must manually add a workable dependency.
  *
  * @param {string=} opt_regionOrLang If region tag is provided, timezone ids
  *    specific this region are considered. If language is provided, all regions
@@ -69,9 +69,9 @@ goog.locale.getTimeZoneSelectedLongNames = function(opt_regionOrLang) {
  * Returns the displayable list of long timezone names paired with its id for
  * the current locale.
  *
- * This method depends on `goog.locale.TimeZoneAllLongNames__<locale>` available
- * from http://go/js_locale_data. Users of this method must add a dependency on
- * this.
+ * This method depends on `goog.locale.TimeZoneAllLongNames__<locale>`,
+ * which are is provided as part of Closure Library since this package is
+ * deprecated.  Users must manually add a workable dependency.
  *
  * @return {Array<Object>} localized and relevant list of timezone names
  *    and ids.
@@ -88,9 +88,9 @@ goog.locale.getTimeZoneAllLongNames = function() {
  * Returns the displayable list of timezone names paired with its id for
  * the current locale, selected based on the region or language provided.
  *
- * This method depends on `goog.locale.TimeZone*__<locale>` available
- * from http://go/js_locale_data. Users of this method must add a dependency on
- * this.
+ * This method depends on `goog.locale.TimeZone*__<locale>` being available,
+ * which are not provided as part of Closure Library since this package is
+ * deprecated.  Users must manually add a workable dependency.
  *
  * @param {string} nameType Resource name to be loaded to get the names.
  *
diff --git a/closure/goog/locale/timezonelist_test.js b/closure/goog/locale/timezonelist_test.js
index 1e310f9564..bdaf5eeebb 100644
--- a/closure/goog/locale/timezonelist_test.js
+++ b/closure/goog/locale/timezonelist_test.js
@@ -57,7 +57,6 @@ document.write('<hr>');
 
 testSuite({
   setUpPage() {
-    // Test data files are in in http://go/js_locale_data
 
     // Test data from TimeZoneSelectedIds__FR.js
     const TimeZoneSelectedIds__FR =
diff --git a/closure/goog/module/loader.js b/closure/goog/module/loader.js
index 76be5a5afd..81909d9acb 100644
--- a/closure/goog/module/loader.js
+++ b/closure/goog/module/loader.js
@@ -9,7 +9,6 @@
  * @fileoverview This class supports the dynamic loading of compiled
  * javascript modules at runtime, as described in the designdoc.
  *
- *   <http://go/js_modules_design>
  */
 
 goog.provide('goog.module.Loader');
diff --git a/closure/goog/module/module.js b/closure/goog/module/module.js
index 548bef4551..1b600ca5b5 100644
--- a/closure/goog/module/module.js
+++ b/closure/goog/module/module.js
@@ -9,7 +9,6 @@
  * @fileoverview This class supports the dynamic loading of compiled
  * javascript modules at runtime, as described in the designdoc.
  *
- *   <http://go/js_modules_design>
  */
 
 goog.provide('goog.module');
diff --git a/closure/goog/net/channelrequest.js b/closure/goog/net/channelrequest.js
index f8f3976a50..edd694f804 100644
--- a/closure/goog/net/channelrequest.js
+++ b/closure/goog/net/channelrequest.js
@@ -899,7 +899,7 @@ goog.net.ChannelRequest.prototype.getNextChunk_ = function(responseText) {
 /**
  * Uses the Trident htmlfile ActiveX control to send a GET request in IE. This
  * is the innovation discovered that lets us get intermediate results in
- * Internet Explorer.  Thanks to http://go/kev
+ * Internet Explorer.
  * @param {goog.Uri} uri The uri to request from.
  * @param {boolean} usingSecondaryDomain Whether to use a secondary domain.
  */
diff --git a/closure/goog/net/crossdomainrpc.js b/closure/goog/net/crossdomainrpc.js
index 4b9d22ac95..8ef905cfc0 100644
--- a/closure/goog/net/crossdomainrpc.js
+++ b/closure/goog/net/crossdomainrpc.js
@@ -5,8 +5,7 @@
  */
 
 /**
- * @fileoverview Cross domain RPC library using the <a
- * href="http://go/xd2_design" target="_top">XD2 approach</a>.
+ * @fileoverview Cross domain RPC library using the XD2 approach.
  *
  * <h5>Protocol</h5>
  * Client sends a request across domain via a form submission.  Server
@@ -43,13 +42,6 @@
  * &lt;/body&gt;
  * </pre>
  *
- * <h5>Server Side</h5>
- * For an example of the server side, refer to the following files:
- * <ul>
- * <li>http://go/xdservletfilter.java</li>
- * <li>http://go/xdservletrequest.java</li>
- * <li>http://go/xdservletresponse.java</li>
- * </ul>
  *
  * <h5>System Requirements</h5>
  * Tested on IE6, IE7, Firefox 2.0 and Safari nightly r23841.
diff --git a/closure/goog/reflect/reflect.js b/closure/goog/reflect/reflect.js
index 70de7a64a1..457e12ba08 100644
--- a/closure/goog/reflect/reflect.js
+++ b/closure/goog/reflect/reflect.js
@@ -13,7 +13,6 @@ goog.provide('goog.reflect');
 
 /**
  * Syntax for object literal casts.
- * @see http://go/jscompiler-renaming
  * @see https://goo.gl/CRs09P
  *
  * Use this if you have an object literal whose keys need to have the same names
diff --git a/closure/goog/ui/style/app/buttonrenderer.js b/closure/goog/ui/style/app/buttonrenderer.js
index 787e78e0ca..20d62bf560 100644
--- a/closure/goog/ui/style/app/buttonrenderer.js
+++ b/closure/goog/ui/style/app/buttonrenderer.js
@@ -12,8 +12,6 @@
  * dimensionality (via a subtle flat shadow on the bottom half of the button)
  * without the use of images.
  *
- * Based on the Custom Buttons 3.1 visual specification, see
- * http://go/custombuttons
  */
 
 goog.provide('goog.ui.style.app.ButtonRenderer');