diff --git a/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.installer.yaml b/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.installer.yaml
new file mode 100644
index 000000000..182785848
--- /dev/null
+++ b/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.installer.yaml
@@ -0,0 +1,38 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.installer.1.0.0.schema.json
+PackageIdentifier: Mozilla.Firefox
+PackageVersion: "81.0"
+FileExtensions:
+- html
+- htm
+- url
+Protocols:
+- http
+- https
+Commands:
+- firefox
+MinimumOSVersion: 10.0.0.0
+Installers:
+- Architecture: x64
+  InstallerType: msi
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/firefox/releases/81.0/win64/en-US/Firefox%20Setup%2081.0.msi
+  InstallerSha256: 739D5795CA6BF90EDE8F8768F36538AC678176533883D95346507ACBD288EA41
+  Scope: machine
+  InstallerLocale: en-US
+- Architecture: x86
+  InstallerType: msi
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/firefox/releases/81.0/win32/en-US/Firefox%20Setup%2081.0.msi
+  InstallerSha256: BFC7E57067171610B984A3BA1EEB3963FEFF3C9FF1B7533D7429EC69345438AF
+  Scope: machine
+  InstallerLocale: en-US
+- Architecture: arm64
+  InstallerType: exe
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/firefox/releases/81.0/win64-aarch64/en-US/Firefox%20Setup%2081.0.exe
+  InstallerSha256: 6F6285DE2969F0304FEDDA6A6D414AECBA86171A808EF2CFFC47D1CE3DA52D99
+  Scope: machine
+  InstallerLocale: en-US
+  InstallerSwitches:
+    Silent: /S
+    SilentWithProgress: /S
+ManifestType: installer
+ManifestVersion: 1.0.0
+
diff --git a/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.locale.en-US.yaml b/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.locale.en-US.yaml
new file mode 100644
index 000000000..466dbcf82
--- /dev/null
+++ b/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.locale.en-US.yaml
@@ -0,0 +1,19 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.defaultlocale.1.0.0.schema.json
+PackageIdentifier: Mozilla.Firefox
+PackageVersion: "81.0"
+PackageLocale: en-US
+Author: Mozilla
+Moniker: firefox
+Tags:
+- Browser
+- Mozilla
+- Firefox
+PackageUrl: https://www.mozilla.org/en-US/firefox/new/
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+Publisher: Mozilla
+PackageName: Firefox
+License: Mozilla Public License Version 2.0
+ShortDescription: Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.
+ManifestType: defaultLocale
+ManifestVersion: 1.0.0
+
diff --git a/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.yaml b/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.yaml
index 75be1684e..eaace9409 100644
--- a/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.yaml
+++ b/manifests/m/Mozilla/Firefox/81.0/Mozilla.Firefox.yaml
@@ -1,34 +1,7 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.version.1.0.0.schema.json
 PackageIdentifier: Mozilla.Firefox
-Publisher: Mozilla
-PackageName: Firefox
-Author: Mozilla
-ShortDescription: Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.
-Moniker: firefox
-Tags:
-- Browser
-- Mozilla
-- Firefox
-FileExtensions:
-- html
-- htm
-- url
-Protocols:
-- http
-- https
-Commands:
-- firefox
-PackageUrl: https://www.mozilla.org/en-US/firefox/new/
-License: Mozilla Public License Version 2.0
-LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
-MinimumOSVersion: 10.0.0.0
-PackageVersion: 81.0
-InstallerType: msi
-Installers:
-- Architecture: x64
-  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/firefox/releases/81.0/win64/en-US/Firefox%20Setup%2081.0.msi
-  InstallerSha256: 739d5795ca6bf90ede8f8768f36538ac678176533883d95346507acbd288ea41
-  Scope: machine
-  InstallerLocale: en-US
-PackageLocale: en-US
-ManifestType: singleton
+PackageVersion: "81.0"
+DefaultLocale: en-US
+ManifestType: version
 ManifestVersion: 1.0.0
+