diff --git a/Documentation/js_licenses.txt b/Documentation/js_licenses.txt
index f6120a7..48e729f 100644
--- a/Documentation/js_licenses.txt
+++ b/Documentation/js_licenses.txt
@@ -1348,6 +1348,219 @@
 ----
 
 
+[[shadow-selection-polyfill]]
+shadow-selection-polyfill
+
+* shadow-selection-polyfill
+
+[[shadow-selection-polyfill_license]]
+----
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+----
+
+
 [[tslib]]
 tslib
 
diff --git a/Documentation/licenses.txt b/Documentation/licenses.txt
index d43203f..cd794b8 100644
--- a/Documentation/licenses.txt
+++ b/Documentation/licenses.txt
@@ -74,6 +74,7 @@
 * jetty:server
 * jetty:servlet
 * jetty:util
+* jetty:util-ajax
 * log:log4j
 * lucene:lucene-analyzers-common
 * lucene:lucene-core-and-backward-codecs-merged
@@ -4292,6 +4293,219 @@
 ----
 
 
+[[shadow-selection-polyfill]]
+shadow-selection-polyfill
+
+* shadow-selection-polyfill
+
+[[shadow-selection-polyfill_license]]
+----
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+----
+
+
 [[tslib]]
 tslib
 
diff --git a/Documentation/user-attention-set.txt b/Documentation/user-attention-set.txt
index bca338a..2cf3a7b 100644
--- a/Documentation/user-attention-set.txt
+++ b/Documentation/user-attention-set.txt
@@ -156,7 +156,7 @@
 
 === For Gerrit Admins
 
-The Attention Set will be part of the upcoming 3.3 release (due late 2020). It
+The Attention Set has been available since the 3.3 release (late 2020). It
 is enabled by default, but you can disable it by setting
 link:config-gerrit.html#change.enableAttentionSet[enableAttentionSet] to false.
 
diff --git a/WORKSPACE b/WORKSPACE
index 6c4b4e9..d84c298 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -836,48 +836,55 @@
     sha1 = "7e060dd5b19431e6d198e91ff670644372f60fbd",
 )
 
-JETTY_VERS = "9.4.33.v20201020"
+JETTY_VERS = "9.4.35.v20201120"
 
 maven_jar(
     name = "jetty-servlet",
     artifact = "org.eclipse.jetty:jetty-servlet:" + JETTY_VERS,
-    sha1 = "101609e8e5365c4406e4448099459eb605ac551f",
+    sha1 = "3e61bcb471e1bfc545ce866cbbe33c3aedeec9b1",
 )
 
 maven_jar(
     name = "jetty-security",
     artifact = "org.eclipse.jetty:jetty-security:" + JETTY_VERS,
-    sha1 = "c150bf2aca6cb1636e7195f844a2bb156546e50e",
+    sha1 = "80dc2f422789c78315de76d289b7a5b36c3232d5",
 )
 
 maven_jar(
     name = "jetty-server",
     artifact = "org.eclipse.jetty:jetty-server:" + JETTY_VERS,
-    sha1 = "f586ff2ee048ad2575866c1833d854288f402307",
+    sha1 = "513502352fd689d4730b2935421b990ada8cc818",
 )
 
 maven_jar(
     name = "jetty-jmx",
     artifact = "org.eclipse.jetty:jetty-jmx:" + JETTY_VERS,
-    sha1 = "56b723070eeafc51b943cd9bf1a064a037e806a7",
+    sha1 = "38812031940a466d626ab5d9bbbd9d5d39e9f735",
 )
 
 maven_jar(
     name = "jetty-http",
     artifact = "org.eclipse.jetty:jetty-http:" + JETTY_VERS,
-    sha1 = "ad28940f89ffde6ec1bd1656fe3f8493b01ba3c2",
+    sha1 = "45d35131a35a1e76991682174421e8cdf765fb9f",
 )
 
 maven_jar(
     name = "jetty-io",
     artifact = "org.eclipse.jetty:jetty-io:" + JETTY_VERS,
-    sha1 = "9e4b0048285b71f4769908780f957a470eca11da",
+    sha1 = "eb9460700b99b71ecd82a53697f5ff99f69b9e1c",
 )
 
 maven_jar(
     name = "jetty-util",
     artifact = "org.eclipse.jetty:jetty-util:" + JETTY_VERS,
-    sha1 = "c88807f210ab216aa831b48569ef50bd797384bc",
+    sha1 = "ef61b83f9715c3b5355b633d9f01d2834f908ece",
+)
+
+maven_jar(
+    name = "jetty-util-ajax",
+    artifact = "org.eclipse.jetty:jetty-util-ajax:" + JETTY_VERS,
+    sha1 = "ebbb43912c6423bedb3458e44aee28eeb4d66f27",
+    src_sha1 = "b3acea974a17493afb125a9dfbe783870ce1d2f9",
 )
 
 maven_jar(
@@ -1127,8 +1134,8 @@
 bower_archive(
     name = "codemirror-minified",
     package = "Dominator008/codemirror-minified",
-    sha1 = "d00f3b97345772d5a7790f206cb1e3c22e96caf6",
-    version = "5.50.2",
+    sha1 = "a1ddf3a6dcc6817597eacc52688cfe5083ded4cd",
+    version = "5.59.1",
 )
 
 # bower test stuff
diff --git a/java/com/google/gerrit/server/config/HasOperandAliasConfig.java b/java/com/google/gerrit/server/config/HasOperandAliasConfig.java
index 1d79ce0..7941c04 100644
--- a/java/com/google/gerrit/server/config/HasOperandAliasConfig.java
+++ b/java/com/google/gerrit/server/config/HasOperandAliasConfig.java
@@ -39,7 +39,7 @@
   }
 
   private void loadChangeHasOperandAliases() {
-    for (String name : cfg.getNames(SECTION, SUBSECTION_CHANGE)) {
+    for (String name : cfg.getNames(SECTION, SUBSECTION_CHANGE, true)) {
       changeQueryHasOperandAliases.put(name, cfg.getString(SECTION, SUBSECTION_CHANGE, name));
     }
   }
diff --git a/java/com/google/gerrit/server/config/OperatorAliasConfig.java b/java/com/google/gerrit/server/config/OperatorAliasConfig.java
index 0c5fc6e..4cdfa4e5 100644
--- a/java/com/google/gerrit/server/config/OperatorAliasConfig.java
+++ b/java/com/google/gerrit/server/config/OperatorAliasConfig.java
@@ -39,7 +39,7 @@
   }
 
   private void loadChangeOperatorAliases() {
-    for (String name : cfg.getNames(SECTION, SUBSECTION_CHANGE)) {
+    for (String name : cfg.getNames(SECTION, SUBSECTION_CHANGE, true)) {
       changeQueryOperatorAliases.put(name, cfg.getString(SECTION, SUBSECTION_CHANGE, name));
     }
   }
diff --git a/lib/jetty/BUILD b/lib/jetty/BUILD
index fe07794..4619ac4 100644
--- a/lib/jetty/BUILD
+++ b/lib/jetty/BUILD
@@ -4,7 +4,10 @@
     name = "servlet",
     data = ["//lib:LICENSE-Apache2.0"],
     visibility = ["//visibility:public"],
-    exports = ["@jetty-servlet//jar"],
+    exports = [
+        ":util-ajax",
+        "@jetty-servlet//jar",
+    ],
     runtime_deps = [":security"],
 )
 
@@ -60,3 +63,9 @@
     data = ["//lib:LICENSE-Apache2.0"],
     exports = ["@jetty-util//jar"],
 )
+
+java_library(
+    name = "util-ajax",
+    data = ["//lib:LICENSE-Apache2.0"],
+    exports = ["@jetty-util-ajax//jar"],
+)
diff --git a/polygerrit-ui/app/.eslintrc.js b/polygerrit-ui/app/.eslintrc.js
index ba2c40d..764d5e8 100644
--- a/polygerrit-ui/app/.eslintrc.js
+++ b/polygerrit-ui/app/.eslintrc.js
@@ -284,6 +284,8 @@
           message: 'Use @polymer/decorators instead',
         }],
         '@typescript-eslint/no-explicit-any': 'error',
+        // See https://github.com/GoogleChromeLabs/shadow-selection-polyfill/issues/9
+        '@typescript-eslint/ban-ts-comment': 'off',
         // The following rules is required to match internal google rules
         '@typescript-eslint/restrict-plus-operands': 'error',
         '@typescript-eslint/no-unused-vars': [
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-highlight/gr-diff-highlight.ts b/polygerrit-ui/app/elements/diff/gr-diff-highlight/gr-diff-highlight.ts
index c788d76..322d274 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-highlight/gr-diff-highlight.ts
+++ b/polygerrit-ui/app/elements/diff/gr-diff-highlight/gr-diff-highlight.ts
@@ -235,6 +235,11 @@
    * (line, side, etc).
    */
   _getNormalizedRange(selection: Selection) {
+    /* On Safari the ShadowRoot.getSelection() isn't there and the only thing
+       we can get is a single Range */
+    if (selection instanceof Range) {
+      return this._normalizeRange(selection);
+    }
     const rangeCount = selection.rangeCount;
     if (rangeCount === 0) {
       return null;
@@ -393,12 +398,20 @@
   }
 
   _handleSelection(selection: Selection, isMouseUp: boolean) {
+    /* On Safari, the selection events may return a null range that should
+       be ignored */
+    if (!selection) {
+      return;
+    }
     const normalizedRange = this._getNormalizedRange(selection);
     if (!this._isRangeValid(normalizedRange)) {
       this._removeActionBox();
       return;
     }
-    const domRange = selection.getRangeAt(0);
+    /* On Safari the ShadowRoot.getSelection() isn't there and the only thing
+       we can get is a single Range */
+    const domRange =
+      selection instanceof Range ? selection : selection.getRangeAt(0);
     const start = normalizedRange!.start!;
     const end = normalizedRange!.end!;
 
diff --git a/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.ts b/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.ts
index 39d645e..5942687 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.ts
+++ b/polygerrit-ui/app/elements/diff/gr-diff/gr-diff.ts
@@ -68,6 +68,9 @@
 import {AbortStop} from '../../shared/gr-cursor-manager/gr-cursor-manager';
 import {fireAlert, fireEvent} from '../../../utils/event-util';
 import {MovedChunkGoToLineEvent} from '../../../types/events';
+// TODO(davido): See: https://github.com/GoogleChromeLabs/shadow-selection-polyfill/issues/9
+// @ts-ignore
+import * as shadow from 'shadow-selection-polyfill/shadow.js';
 
 const NO_NEWLINE_BASE = 'No newline at end of base file.';
 const NO_NEWLINE_REVISION = 'No newline at end of revision file.';
@@ -322,10 +325,18 @@
     }
 
     if (loggedIn && isAttached) {
-      this.listen(document, 'selectionchange', '_handleSelectionChange');
+      this.listen(
+        document,
+        '-shadow-selectionchange',
+        '_handleSelectionChange'
+      );
       this.listen(document, 'mouseup', '_handleMouseUp');
     } else {
-      this.unlisten(document, 'selectionchange', '_handleSelectionChange');
+      this.unlisten(
+        document,
+        '-shadow-selectionchange',
+        '_handleSelectionChange'
+      );
       this.unlisten(document, 'mouseup', '_handleMouseUp');
     }
   }
@@ -354,7 +365,7 @@
     // This takes the shadow DOM selection if one exists.
     return this.root instanceof ShadowRoot && this.root.getSelection
       ? this.root.getSelection()
-      : document.getSelection();
+      : shadow.getRange(this.root);
   }
 
   _observeNodes() {
diff --git a/polygerrit-ui/app/node_modules_licenses/licenses.ts b/polygerrit-ui/app/node_modules_licenses/licenses.ts
index 0e2307b..7a6253b 100644
--- a/polygerrit-ui/app/node_modules_licenses/licenses.ts
+++ b/polygerrit-ui/app/node_modules_licenses/licenses.ts
@@ -278,6 +278,14 @@
     license: SharedLicenses.Page
   },
   {
+    name: "shadow-selection-polyfill",
+    license: {
+      name: "shadow-selection-polyfill",
+      type: LicenseTypes.Apache2_0,
+      packageLicenseFile: "LICENSE"
+    }
+  },
+  {
     name: "path-to-regexp",
     license: {
       name: "path-to-regexp",
diff --git a/polygerrit-ui/app/package.json b/polygerrit-ui/app/package.json
index fad72ef..3351386 100644
--- a/polygerrit-ui/app/package.json
+++ b/polygerrit-ui/app/package.json
@@ -32,7 +32,8 @@
     "page": "^1.11.5",
     "polymer-bridges": "file:../../polymer-bridges/",
     "polymer-resin": "^2.0.1",
-    "rxjs": "^6.6.2"
+    "rxjs": "^6.6.2",
+    "shadow-selection-polyfill": "^1.1.0"
   },
   "license": "Apache-2.0",
   "private": true
diff --git a/polygerrit-ui/app/yarn.lock b/polygerrit-ui/app/yarn.lock
index e5f0380..e544dbc 100644
--- a/polygerrit-ui/app/yarn.lock
+++ b/polygerrit-ui/app/yarn.lock
@@ -391,6 +391,11 @@
   dependencies:
     tslib "^1.9.0"
 
+shadow-selection-polyfill@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/shadow-selection-polyfill/-/shadow-selection-polyfill-1.1.0.tgz#87eee5c3cd9c7296f9fec083ba6f4910b1fa6686"
+  integrity sha512-ntz8P6DLEFpx7gikeXZ4gSi3APE2D+BP0rKnnaBzED+Lm8je8nkNcayy6kGWPEDWMFbtm+Yvd1ONFaXcsVWn2w==
+
 tslib@^1.9.0:
   version "1.13.0"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.13.0.tgz#c881e13cc7015894ed914862d276436fa9a47043"
diff --git a/tools/nongoogle.bzl b/tools/nongoogle.bzl
index db78c8d..8d0d593 100644
--- a/tools/nongoogle.bzl
+++ b/tools/nongoogle.bzl
@@ -180,8 +180,8 @@
     # Keep this version of Soy synchronized with the version used in Gitiles.
     maven_jar(
         name = "soy",
-        artifact = "com.google.template:soy:2020-08-24",
-        sha1 = "e774bf5cc95923d2685292883fe219e231346e50",
+        artifact = "com.google.template:soy:2019-10-08",
+        sha1 = "4518bf8bac2dbbed684849bc209c39c4cb546237",
     )
 
     # Test-only dependencies below.