diff --git a/taskcluster/ci/beetmover-repackage/kind.yml b/taskcluster/ci/beetmover-repackage/kind.yml
index fe82db8c23b8..e249338d07b9 100644
--- a/taskcluster/ci/beetmover-repackage/kind.yml
+++ b/taskcluster/ci/beetmover-repackage/kind.yml
@@ -24,6 +24,7 @@ kind-dependencies:
     - partials
     - partials-signing
     - repackage-signing-msi
+    - repackage-signing-shippable-l10n-msix
     - mar-signing
     - mar-signing-l10n
 
diff --git a/taskcluster/taskgraph/manifests/firefox_candidates.yml b/taskcluster/taskgraph/manifests/firefox_candidates.yml
index faae06a207bb..7895fdd2af78 100644
--- a/taskcluster/taskgraph/manifests/firefox_candidates.yml
+++ b/taskcluster/taskgraph/manifests/firefox_candidates.yml
@@ -48,6 +48,7 @@ tasktype_map:
     repackage: repackage
     repackage-signing: repackage
     repackage-signing-msi: repackage
+    repackage-signing-shippable-l10n-msix: signing
     langpack-copy: scriptworker
 platform_names:
     path_platform:
@@ -359,6 +360,17 @@ mapping:
             - win32-devedition
         pretty_name: Firefox Setup ${version}.msi
         checksums_path: ${path_platform}/${locale}/Firefox Setup ${version}.msi
+    target.installer.msix:
+        <<: *default
+        description: "Windows MSIX installer"
+        from:
+            - repackage-signing-shippable-l10n-msix
+        only_for_platforms:
+            - win64-shippable
+            - win32-shippable
+        locale_prefix: 'multi/'
+        pretty_name: Firefox Setup ${version}.msix
+        checksums_path: ${path_platform}/multi/Firefox Setup ${version}.msix
     target.complete.mar:
         <<: *default
         description: "Complete MAR to serve as updates"
diff --git a/taskcluster/taskgraph/manifests/firefox_nightly.yml b/taskcluster/taskgraph/manifests/firefox_nightly.yml
index af6299507139..0a57a4b1578e 100644
--- a/taskcluster/taskgraph/manifests/firefox_nightly.yml
+++ b/taskcluster/taskgraph/manifests/firefox_nightly.yml
@@ -44,6 +44,7 @@ tasktype_map:
     repackage: repackage
     repackage-signing: repackage
     repackage-signing-msi: repackage
+    repackage-signing-shippable-l10n-msix: signing
     langpack-copy: signing
 platform_names:
     filename_platform:
@@ -427,6 +428,21 @@ mapping:
                 default:
                     - ${year}/${month}/${upload_date}-${branch}-l10n
                     - latest-${branch}-l10n
+    target.installer.msix:
+        <<: *default
+        description: "Windows MSIX installer"
+        all_locales: true
+        from:
+            - repackage-signing-shippable-l10n-msix
+        only_for_platforms:
+            - win64-shippable
+            - win32-shippable
+        pretty_name: firefox-${version}.multi.${filename_platform}.installer.msix
+        checksums_path: firefox-${version}.multi.${filename_platform}.installer.msix
+        destinations:
+            - ${year}/${month}/${upload_date}-${branch}
+            - latest-${branch}
+            - latest-${branch}-l10n
     target.complete.mar:
         <<: *default
         description: "The main installer we ship our products baked within"
diff --git a/taskcluster/taskgraph/transforms/beetmover_repackage.py b/taskcluster/taskgraph/transforms/beetmover_repackage.py
index 8d350845829b..9c19e19afa0b 100644
--- a/taskcluster/taskgraph/transforms/beetmover_repackage.py
+++ b/taskcluster/taskgraph/transforms/beetmover_repackage.py
@@ -83,6 +83,7 @@ def make_task_description(config, jobs):
         repackage_name = "repackage"
         repackage_signing_name = "repackage-signing"
         msi_signing_name = "repackage-signing-msi"
+        msix_signing_name = "repackage-signing-shippable-l10n-msix"
         mar_signing_name = "mar-signing"
         if job.get("locale"):
             signing_name = "shippable-l10n-signing"
@@ -100,6 +101,8 @@ def make_task_description(config, jobs):
             dependencies["partials-signing"] = upstream_deps["partials-signing"]
         if msi_signing_name in upstream_deps:
             dependencies[msi_signing_name] = upstream_deps[msi_signing_name]
+        if msix_signing_name in upstream_deps:
+            dependencies[msix_signing_name] = upstream_deps[msix_signing_name]
         if repackage_signing_name in upstream_deps:
             dependencies["repackage-signing"] = upstream_deps[repackage_signing_name]