diff --git a/manifests/Mozilla/FirefoxDeveloperEdition/88.0b1.yaml b/manifests/Mozilla/FirefoxDeveloperEdition/88.0b1.yaml
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+Id: Mozilla.FirefoxDeveloperEdition
+Version: 88.0b1
+Name: Firefox Developer Edition
+Publisher: Mozilla
+License: Mozilla Public License V2.0
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+AppMoniker: firefoxdev
+Tags: browser, mozilla, firefox, dev
+Description: Firefox Developer Edition is the blazing fast browser that offers cutting edge developer tools and latest features like CSS Grid support and framework debugging.
+Homepage: https://www.mozilla.org/en-US/firefox/developer/
+Installers:
+- Arch: x64
+  Url: https://download-installer.cdn.mozilla.net/pub/devedition/releases/88.0b1/win64/en-US/Firefox%20Setup%2088.0b1.msi
+  Sha256: 66D421157AFA49F046416173B94C07851729721D698D334FC743E4495EAC86DC
+  InstallerType: msi
+