diff --git a/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.installer.yaml b/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.installer.yaml
new file mode 100644
index 000000000..7ab88af4f
--- /dev/null
+++ b/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.installer.yaml
@@ -0,0 +1,22 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.installer.1.0.0.schema.json
+PackageIdentifier: Mozilla.FirefoxDeveloperEdition
+PackageVersion: 89.0b15
+Installers:
+- Architecture: x64
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/devedition/releases/89.0b15/win64/en-US/Firefox%20Setup%2089.0b15.msi
+  InstallerSha256: EACA798785F6E55409CEF2F2BEBB74620A040B81132FADA073A527F240DD3DDC
+  InstallerType: msi
+- Architecture: x86
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/devedition/releases/89.0b15/win32/en-US/Firefox%20Setup%2089.0b15.msi
+  InstallerSha256: 632728BCD50A434556572E29920D07E6DE820C35B73A158BCD24815E896DDB64
+  InstallerType: msi
+- Architecture: arm64
+  InstallerUrl: https://download-installer.cdn.mozilla.net/pub/devedition/releases/89.0b15/win64-aarch64/en-US/Firefox%20Setup%2089.0b15.exe
+  InstallerSha256: 66D5E343305D13579AFC66C0935965497DE0A1D2D9027C36592524F8BBA96FA2
+  InstallerType: exe
+  InstallerSwitches:
+    Silent: /S
+    SilentWithProgress: /S
+ManifestType: installer
+ManifestVersion: 1.0.0
+
diff --git a/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.locale.en-US.yaml b/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.locale.en-US.yaml
new file mode 100644
index 000000000..6e7bf427c
--- /dev/null
+++ b/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.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.FirefoxDeveloperEdition
+PackageVersion: 89.0b15
+PackageLocale: en-US
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+Moniker: firefoxdev
+Tags:
+- browser
+- mozilla
+- firefox
+- dev
+PackageUrl: https://www.mozilla.org/en-US/firefox/developer/
+Publisher: Mozilla
+PackageName: Firefox Developer Edition
+License: Mozilla Public License V2.0
+ShortDescription: Firefox Developer Edition is the blazing fast browser that offers cutting edge developer tools and latest features like CSS Grid support and framework debugging.
+ManifestType: defaultLocale
+ManifestVersion: 1.0.0
+
diff --git a/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.yaml b/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.yaml
new file mode 100644
index 000000000..3cc803510
--- /dev/null
+++ b/manifests/m/Mozilla/FirefoxDeveloperEdition/89.0b15/Mozilla.FirefoxDeveloperEdition.yaml
@@ -0,0 +1,7 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.version.1.0.0.schema.json
+PackageIdentifier: Mozilla.FirefoxDeveloperEdition
+PackageVersion: 89.0b15
+DefaultLocale: en-US
+ManifestType: version
+ManifestVersion: 1.0.0
+