Add manifest file for Mozilla Firefox (Deutsch) v79.0 x64 (#2694)

* Add manifest file for Mozilla Firefox (Deutsch) v79.0 x64

* Modify the manifest file to account for the Manifest Validation error

* Modify manifest file to account for Manifest Validation Error (match the yaml file name with the version property in manifest file)

manifests/Mozilla/Firefox/Firefox_v79.0/79.0 (DE).yaml

@@ -0,0 +1,28 @@
+# ================== General ==================
+
+Id: Mozilla.Firefox.Firefox_v79.0
+Version: 79.0 (DE)
+Name: Firefox (Deutsch)
+Publisher: Mozilla
+AppMoniker: firefox_de-DE
+Tags: firefox, firefox de-DE, mozilla firefox
+Description: Mozilla Firefox is free and open source software, built by a community of thousands from all over the world.
+
+# ================== License ==================
+
+Homepage: 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/
+
+# ================= Installer =================
+
+Installers:
+  - Arch: x64
+    Url: https://download-installer.cdn.mozilla.net/pub/firefox/releases/79.0/win64/de/Firefox%20Setup%2079.0.msi
+    Sha256: 1E326D716C2B1759A0B8996F4E81E033931F2E93F58BBCF6B4140EE32840EDE2
+    InstallerType: msi
+    Switches:
+          Custom: /norestart
+          Silent: /qn
+          SilentWithProgress: /qb
+          Language: de-de