diff --git a/manifests/webapp/migrate_from.json b/manifests/webapp/migrate_from.json
new file mode 100644
index 00000000000000..c651562d9a8e82
--- /dev/null
+++ b/manifests/webapp/migrate_from.json
@@ -0,0 +1,39 @@
+{
+  "manifests": {
+    "webapp": {
+      "migrate_from": {
+        "__compat": {
+          "spec_url": "https://wicg.github.io/manifest-incubations/#migrate_from-member",
+          "support": {
+            "chrome": {
+              "version_added": "149"
+            },
+            "chrome_android": {
+              "version_added": false
+            },
+            "edge": "mirror",
+            "firefox": {
+              "version_added": false
+            },
+            "firefox_android": "mirror",
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": "mirror",
+            "webview_ios": "mirror"
+          },
+          "status": {
+            "experimental": true,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/manifests/webapp/migrate_to.json b/manifests/webapp/migrate_to.json
new file mode 100644
index 00000000000000..9c0413ef4b600d
--- /dev/null
+++ b/manifests/webapp/migrate_to.json
@@ -0,0 +1,39 @@
+{
+  "manifests": {
+    "webapp": {
+      "migrate_to": {
+        "__compat": {
+          "spec_url": "https://wicg.github.io/manifest-incubations/#migrate_to-member",
+          "support": {
+            "chrome": {
+              "version_added": "149"
+            },
+            "chrome_android": {
+              "version_added": false
+            },
+            "edge": "mirror",
+            "firefox": {
+              "version_added": false
+            },
+            "firefox_android": "mirror",
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": false
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": "mirror",
+            "webview_ios": "mirror"
+          },
+          "status": {
+            "experimental": true,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      }
+    }
+  }
+}