diff --git a/manifests/Mozilla/Thunderbird/Thunderbird_v78.1.1/78.1.1 (IS).yaml b/manifests/Mozilla/Thunderbird/Thunderbird_v78.1.1/78.1.1 (IS).yaml
new file mode 100644
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+++ b/manifests/Mozilla/Thunderbird/Thunderbird_v78.1.1/78.1.1 (IS).yaml	
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+Id: Mozilla.Thunderbird.Thunderbird_v78.1.1
+Version: 78.1.1 (IS)
+Name: Thunderbird (Icelandic)
+Publisher: Mozilla
+License: Mozilla Public License Version 2.0
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+AppMoniker: thunderbird, Thunderbird (Icelandic)
+Tags: thunderbird, email, E-mail, Thunderbird (Icelandic)
+Description: Thunderbird is a free email application that’s easy to set up and customize!
+Homepage: https://www.thunderbird.net
+Installers:
+  - Arch: x64
+    Url: https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/78.1.1/win64/is/Thunderbird%20Setup%2078.1.1.msi
+    Sha256: DC1FF63A5A62A206DF037B16DC899517C96DE78A4B9D7A950CFAF98DE4BB032B
+    InstallerType: msi