Add FirefoxESR-78.1.0esr. (#3140)

manifests/Mozilla/FirefoxESR/78.1.0esr.yaml

@@ -0,0 +1,18 @@
+Id: Mozilla.FirefoxESR
+Version: 78.1.0esr
+Name: Firefox ESR
+Publisher: Mozilla
+License: Mozilla Public License V2.0
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+AppMoniker: firefoxesr
+Tags: browser, firefox, mozilla, esr
+Description: Get unmatched data protection on the release cadence that suits you with Firefox for enterprise.
+Homepage: https://www.mozilla.org/en-US/firefox/enterprise/
+Installers:
+  - Arch: x64
+    Url: https://ftp.mozilla.org/pub/firefox/releases/78.1.0esr/win64/en-US/Firefox%20Setup%2078.1.0esr.msi
+    Sha256: 8765DFA132CAF00A4BA6A71B7697D1D278EE9F6AE60A215BE2F47DC081617064
+    InstallerType: msi
+    Switches:
+      Silent: /quiet
+      SilentWithProgress: /passive