diff --git a/tools/under-control/src/RELEASE b/tools/under-control/src/RELEASE
index 7ced7168..4df063cf 100644
--- a/tools/under-control/src/RELEASE
+++ b/tools/under-control/src/RELEASE
@@ -1 +1 @@
-142.0.7444.60
+142.0.7444.138
diff --git a/tools/under-control/src/chrome/browser/about_flags.cc b/tools/under-control/src/chrome/browser/about_flags.cc
index e80a06d6..dc3bfe52 100755
--- a/tools/under-control/src/chrome/browser/about_flags.cc
+++ b/tools/under-control/src/chrome/browser/about_flags.cc
@@ -1659,6 +1659,15 @@ const FeatureEntry::FeatureParam kComposeboxNext[] = {
     {"ShowCreateImageTool", "true"},
     {"ForceToolsAndModels", "true"},
 };
+const FeatureEntry::FeatureParam kComposeboxNextSingleContext[] = {
+    {"MaxNumFiles", "1"},
+    {"ShowContextMenu", "true"},
+    {"ShowContextMenuTabPreviews", "true"},
+    {"ShowComposeboxZps", "true"},
+    {"ShowToolsAndModels", "true"},
+    {"ShowCreateImageTool", "true"},
+    {"ForceToolsAndModels", "true"},
+};
 
 const FeatureEntry::FeatureVariation kNtpComposeboxVariations[] = {
     {"- Show ZPS", kComposeboxShowZps, std::size(kComposeboxShowZps), nullptr},
@@ -1687,6 +1696,8 @@ const FeatureEntry::FeatureVariation kNtpComposeboxVariations[] = {
     {"- Show Create Image in Context Menu, ZPS", kShowCreateImageTool,
      std::size(kShowCreateImageTool), nullptr},
     {"- Next Experience", kComposeboxNext, std::size(kComposeboxNext), nullptr},
+    {"- Next Experience Single Context", kComposeboxNextSingleContext,
+     std::size(kComposeboxNextSingleContext), nullptr},
 };
 
 const FeatureEntry::FeatureParam kShowNextRealboxTallBottomContext[] = {
diff --git a/tools/under-control/src/components/policy/resources/templates/policy_definitions/Miscellaneous/BrowserThemeColor.yaml b/tools/under-control/src/components/policy/resources/templates/policy_definitions/Miscellaneous/BrowserThemeColor.yaml
index 952cc849..b9b56e40 100755
--- a/tools/under-control/src/components/policy/resources/templates/policy_definitions/Miscellaneous/BrowserThemeColor.yaml
+++ b/tools/under-control/src/components/policy/resources/templates/policy_definitions/Miscellaneous/BrowserThemeColor.yaml
@@ -12,7 +12,6 @@ features:
   per_profile: true
 future_on:
 - fuchsia
-- ios
 owners:
 - igorruvinov@google.com
 - ydago@google.com
@@ -22,5 +21,6 @@ schema:
   type: string
 supported_on:
 - chrome.*:91-
+- ios:142-
 tags: []
 type: string
diff --git a/tools/under-control/src/components/policy/resources/templates/policy_definitions/Miscellaneous/NTPCustomBackgroundEnabled.yaml b/tools/under-control/src/components/policy/resources/templates/policy_definitions/Miscellaneous/NTPCustomBackgroundEnabled.yaml
index f2320125..65383b1a 100755
--- a/tools/under-control/src/components/policy/resources/templates/policy_definitions/Miscellaneous/NTPCustomBackgroundEnabled.yaml
+++ b/tools/under-control/src/components/policy/resources/templates/policy_definitions/Miscellaneous/NTPCustomBackgroundEnabled.yaml
@@ -11,7 +11,6 @@ features:
   per_profile: true
 future_on:
 - fuchsia
-- ios
 items:
 - caption: Users can customize the New Tab page background
   value: true
@@ -25,5 +24,6 @@ schema:
 supported_on:
 - chrome.*:80-
 - chrome_os:80-
+- ios:142-
 tags: []
 type: main
diff --git a/tools/under-control/src/testing/variations/fieldtrial_testing_config.json b/tools/under-control/src/testing/variations/fieldtrial_testing_config.json
index 0fa02e6a..64fc07ab 100755
--- a/tools/under-control/src/testing/variations/fieldtrial_testing_config.json
+++ b/tools/under-control/src/testing/variations/fieldtrial_testing_config.json
@@ -8623,30 +8623,30 @@
             ],
             "experiments": [
                 {
-                    "name": "Control_20250918",
+                    "name": "Control_20251027",
                     "disable_features": [
-                        "NtpTabGroupsModule",
-                        "NtpTabGroupsModuleZeroState"
+                        "kNtpTabGroupsModule",
+                        "kNtpTabGroupsModuleZeroState"
                     ]
                 },
                 {
-                    "name": "SteadyState_20250918",
+                    "name": "SteadyState_20251027",
                     "enable_features": [
-                        "NtpTabGroupsModule"
+                        "kNtpTabGroupsModule"
                     ],
                     "disable_features": [
-                        "NtpTabGroupsModuleZeroState"
+                        "kNtpTabGroupsModuleZeroState"
                     ]
                 },
                 {
-                    "name": "ZeroState_20250918",
+                    "name": "ZeroState_20251027",
                     "enable_features": [
-                        "NtpTabGroupsModule",
-                        "NtpTabGroupsModuleZeroState"
+                        "kNtpTabGroupsModule",
+                        "kNtpTabGroupsModuleZeroState"
                     ]
                 },
                 {
-                    "name": "Default_20250918"
+                    "name": "Default_20251027"
                 }
             ]
         }
@@ -9514,6 +9514,21 @@
             ]
         }
     ],
+    "DumpOnOOBFontDataServiceCache": [
+        {
+            "platforms": [
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "DumpOnOOBFontDataServiceCache"
+                    ]
+                }
+            ]
+        }
+    ],
     "DwaFeature": [
         {
             "platforms": [
@@ -16850,27 +16865,6 @@
             ]
         }
     ],
-    "OmniboxAiRhsEchoLensToolbeltDesktop": [
-        {
-            "platforms": [
-                "chromeos",
-                "linux",
-                "mac",
-                "windows"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "params": {
-                        "HideAimHintTextOnNtpOpen": "true"
-                    },
-                    "enable_features": [
-                        "AiModeOmniboxEntryPoint"
-                    ]
-                }
-            ]
-        }
-    ],
     "OmniboxAsyncViewInflation": [
         {
             "platforms": [
diff --git a/tools/under-control/src/third_party/blink/renderer/platform/runtime_enabled_features.json5 b/tools/under-control/src/third_party/blink/renderer/platform/runtime_enabled_features.json5
index b10b1fe3..6f47f1f4 100755
--- a/tools/under-control/src/third_party/blink/renderer/platform/runtime_enabled_features.json5
+++ b/tools/under-control/src/third_party/blink/renderer/platform/runtime_enabled_features.json5
@@ -2669,8 +2669,9 @@
       status: "stable",
     },
     {
+      // Moved from status stable to test due to https://crbug.com/456164629.
       name: "HitTestBorderRadiusForStackingContext",
-      status: "stable",
+      status: "test",
     },
     {
       name: "HrefTranslate",
@@ -3626,7 +3627,7 @@
       // Killswitch M142. Overrides the above to enable PaintOffsetTranslation
       // for all composited LayoutObjects.
       name: "PaintOffsetTranslationForComposited",
-      status: "stable",
+      status: "test",
     },
     {
       name: "PaintTimingMixin",
@@ -4460,6 +4461,14 @@
         "default": "test",
       },
     },
+    {
+      // Replicates old behavior which removes selectedness from option
+      // elements when they are all removed from a select at the same time.
+      // https://issues.chromium.org/issues/444330901
+      // Enabled in M142, can be removed in M145.
+      name: "SelectChildrenRemovedFix",
+      status: "stable",
+    },
     {
       // The selectedcontentelement attribute is for connecting select elements
       // to arbitrary <selectedcontent> elements.