diff --git a/manifests/m/Mozilla/Firefox/77.0.1/Mozilla.Firefox.installer.yaml b/manifests/m/Mozilla/Firefox/77.0.1/Mozilla.Firefox.installer.yaml
new file mode 100644
index 000000000..27ab9d3e7
--- /dev/null
+++ b/manifests/m/Mozilla/Firefox/77.0.1/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: 77.0.1
+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/77.0.1/win64/en-US/Firefox%20Setup%2077.0.1.msi
+  InstallerSha256: 14ED31F7981BF9A5855812998DA286CCA34416283315EE4234F9F6B00F38856A
+  Scope: machine
+  InstallerLocale: en-US
+- Architecture: x86
+  InstallerType: msi
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/firefox/releases/77.0.1/win32/en-US/Firefox%20Setup%2077.0.1.msi
+  InstallerSha256: 1F0919CCC2BCBB906B00879C23918E09B1982421CA02B88A8695ABE3BF14ACBB
+  Scope: machine
+  InstallerLocale: en-US
+- Architecture: arm64
+  InstallerType: exe
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/firefox/releases/77.0.1/win64-aarch64/en-US/Firefox%20Setup%2077.0.1.exe
+  InstallerSha256: C70FAD675DE57DD38A3BDA70CD7761C588727984E0E3198CC3948A4E6B53DFF2
+  Scope: machine
+  InstallerLocale: en-US
+  InstallerSwitches:
+    Silent: /S
+    SilentWithProgress: /S
+ManifestType: installer
+ManifestVersion: 1.0.0
+
diff --git a/manifests/m/Mozilla/Firefox/77.0.1/Mozilla.Firefox.locale.en-US.yaml b/manifests/m/Mozilla/Firefox/77.0.1/Mozilla.Firefox.locale.en-US.yaml
new file mode 100644
index 000000000..e943c1641
--- /dev/null
+++ b/manifests/m/Mozilla/Firefox/77.0.1/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: 77.0.1
+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/77.0.1/Mozilla.Firefox.yaml b/manifests/m/Mozilla/Firefox/77.0.1/Mozilla.Firefox.yaml
index 3118f3d9e..ae3db2e9f 100644
--- a/manifests/m/Mozilla/Firefox/77.0.1/Mozilla.Firefox.yaml
+++ b/manifests/m/Mozilla/Firefox/77.0.1/Mozilla.Firefox.yaml
@@ -1,20 +1,7 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.version.1.0.0.schema.json
 PackageIdentifier: Mozilla.Firefox
-Publisher: Mozilla
-PackageName: Firefox
-ShortDescription: Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.
-PackageUrl: https://www.mozilla.org/en-US/firefox/new/
-Tags:
-- Browser
-- Mozilla
-- Firefox
-License: Mozilla Public License Version 2.0
-LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
 PackageVersion: 77.0.1
-InstallerType: msi
-Installers:
-- Architecture: x64
-  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/firefox/releases/77.0.1/win64/en-US/Firefox%20Setup%2077.0.1.msi
-  InstallerSha256: 14ED31F7981BF9A5855812998DA286CCA34416283315EE4234F9F6B00F38856A
-PackageLocale: en-US
-ManifestType: singleton
+DefaultLocale: en-US
+ManifestType: version
 ManifestVersion: 1.0.0
+