new file mode 100644
--- /dev/null
+++ b/mail/config/whats_new_page.yml
@@ -0,0 +1,7 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+---
+-   type: product-details
+    url: https://live.thunderbird.net/thunderbird/releasenotes?locale=%LOCALE%&version={version}&channel={release-type}

--- a/taskcluster/ci/release-balrog-submit-toplevel/kind.yml
+++ b/taskcluster/ci/release-balrog-submit-toplevel/kind.yml
@@ -3,16 +3,17 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 loader: taskgraph.loader.transform:loader
 
 transforms:
     - taskgraph.transforms.release:run_on_releases
     - taskgraph.transforms.release_deps:transforms
     - taskgraph.transforms.scriptworker:add_balrog_scopes
+    - taskgraph.transforms.balrog_toplevel:transforms
     - taskgraph.transforms.task:transforms
 
 job-defaults:
     run-on-projects: []  # to make sure this never runs in CI
     shipping-phase: promote
     worker:
         implementation: balrog
         balrog-action: submit-toplevel
@@ -20,17 +21,17 @@ job-defaults:
         archive-domain:
             by-release-level:
                 production: archive.mozilla.org
                 staging: ftp.stage.mozaws.net
         download-domain:
             by-release-level:
                 production: download.mozilla.org
                 staging: bouncer-bouncer-releng.stage.mozaws.net
-        update-line: {}
+    whats-new-config: comm/mail/config/whats_new_page.yml
 
 jobs:
     thunderbird:
         name: submit-toplevel-thunderbird-release-to-balrog
         description: Submit toplevel Thunderbird release to balrog
         shipping-product: thunderbird
         worker:
             product: thunderbird