diff --git a/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.installer.yaml b/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.installer.yaml
new file mode 100644
index 000000000..4db446a5f
--- /dev/null
+++ b/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.installer.yaml
@@ -0,0 +1,32 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.installer.1.0.0.schema.json
+PackageIdentifier: Mozilla.Thunderbird
+PackageVersion: 78.4.0
+MinimumOSVersion: 10.0.0.0
+FileExtensions:
+  - csv
+  - eml
+  - ldif
+  - xpi
+InstallModes:
+  - interactive
+  - silent
+  - silentWithProgress
+Installers:
+  - Architecture: x64
+    InstallerType: msi
+    InstallerUrl: https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/78.4.0/win64/en-US/Thunderbird%20Setup%2078.4.0.msi
+    InstallerSha256: E82467CC9C986945F01FCFA9BCE1646C587D6EF2E82DF8CFBB406DCAE204A491
+    ProductCode: ""
+    Scope: machine
+    InstallerLocale: en-US
+    UpgradeBehavior: install
+  - Architecture: x64
+    InstallerType: msi
+    InstallerUrl: https://download-installer.cdn.mozilla.net/pub/thunderbird/releases/78.4.0/win64/es-ES/Thunderbird%20Setup%2078.4.0.msi
+    InstallerSha256: 8EC48D76BC5703338FC2115DBB2F25E4CC12BD21FC4CDD57738E6C721CCBCC95
+    ProductCode: ""
+    Scope: machine
+    InstallerLocale: es-ES
+    UpgradeBehavior: install
+ManifestType: installer
+ManifestVersion: 1.0.0
diff --git a/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.locale.en-US.yaml b/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.locale.en-US.yaml
new file mode 100644
index 000000000..9dc9c422c
--- /dev/null
+++ b/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.locale.en-US.yaml
@@ -0,0 +1,26 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.defaultlocale.1.0.0.schema.json
+PackageIdentifier: Mozilla.Thunderbird
+PackageVersion: 78.4.0
+PackageLocale: en-US
+Publisher: Mozilla Foundation
+PublisherUrl: https://www.mozilla.org
+PublisherSupportUrl: https://support.mozilla.org
+PrivacyUrl: https://www.mozilla.org/en-US/privacy/thunderbird/
+Author: Mozilla Foundation
+PackageName: Thunderbird
+PackageUrl: https://www.thunderbird.net
+License: Mozilla Public License Version 2.0
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+#Copyright: 
+CopyrightUrl: https://www.mozilla.org/en-US/foundation/trademarks/policy/
+ShortDescription: Thunderbird is a free email application thats easy to set up and customize!
+#Description: 
+Moniker: thunderbird
+Tags:
+  - thunderbird
+  - email
+  - eMail
+  - e-Mail
+  - email client
+ManifestType: defaultLocale
+ManifestVersion: 1.0.0
diff --git a/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.locale.es-ES.yaml b/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.locale.es-ES.yaml
new file mode 100644
index 000000000..786325926
--- /dev/null
+++ b/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.locale.es-ES.yaml
@@ -0,0 +1,25 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.locale.1.0.0.schema.json
+PackageIdentifier: Mozilla.Thunderbird
+PackageVersion: 78.4.0
+PackageLocale: es-ES
+Publisher: Mozilla Foundation
+PublisherUrl: https://www.mozilla.org
+PublisherSupportUrl: https://support.mozilla.org/es/
+PrivacyUrl: https://www.mozilla.org/en-US/privacy/thunderbird/
+Author: Mozilla Foundation
+PackageName: Thunderbird
+PackageUrl: https://www.thunderbird.net/es-ES/
+License: Mozilla Public License Version 2.0
+LicenseUrl: https://www.mozilla.org/en-US/MPL/2.0/
+#Copyright: 
+CopyrightUrl: https://www.mozilla.org/en-US/foundation/trademarks/policy/
+ShortDescription: Thunderbird es un gestor de correo gratuito fácil de configurar y de personalizar, ¡que incluye funciones extraordinarias!
+#Description: 
+Tags:
+  - thunderbird
+  - email
+  - eMail
+  - e-Mail
+  - email client
+ManifestType: locale
+ManifestVersion: 1.0.0
diff --git a/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.yaml b/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.yaml
new file mode 100644
index 000000000..a5a000df1
--- /dev/null
+++ b/manifests/m/Mozilla/Thunderbird/78.4.0/Mozilla.Thunderbird.yaml
@@ -0,0 +1,6 @@
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.version.1.0.0.schema.json
+PackageIdentifier: Mozilla.Thunderbird
+PackageVersion: 78.4.0
+DefaultLocale: en-US
+ManifestType: version
+ManifestVersion: 1.0.0