diff --git a/testing/mozharness/scripts/release/updates.py b/testing/mozharness/scripts/release/updates.py
index ef11db3c2c39..9676db3315a2 100755
--- a/testing/mozharness/scripts/release/updates.py
+++ b/testing/mozharness/scripts/release/updates.py
@@ -94,7 +94,8 @@ class UpdatesBumper(MercurialScript, BuildbotMixin,
         # TODO: version and appVersion should come from repo
         props = self.buildbot_config["properties"]
         for prop in ['product', 'version', 'build_number', 'revision',
-                     'appVersion', 'balrog_api_root', "channels"]:
+                     'appVersion', 'balrog_api_root', "channels",
+                     'generate_bz2_blob']:
             if props.get(prop):
                 self.info("Overriding %s with %s" % (prop, props[prop]))
                 self.config[prop] = props.get(prop)
@@ -269,6 +270,10 @@ class UpdatesBumper(MercurialScript, BuildbotMixin,
     def submit_to_balrog(self):
         for _, channel_config in self.query_channel_configs():
             self._submit_to_balrog(channel_config)
+        if 'generate_bz2_blob' in self.config and \
+                self.config['generate_bz2_blob']:
+            for _, channel_config in self.query_channel_configs():
+                self._submit_to_balrog_bz2(channel_config)
 
     def _submit_to_balrog(self, channel_config):
         dirs = self.query_abs_dirs()
@@ -306,6 +311,59 @@ class UpdatesBumper(MercurialScript, BuildbotMixin,
 
         self.retry(lambda: self.run_command(cmd, halt_on_failure=True))
 
+    def _submit_to_balrog_bz2(self, channel_config):
+        if "bz2_blob_suffix" not in channel_config:
+            self.info("No need to generate BZ2 blob")
+            return
+
+        dirs = self.query_abs_dirs()
+        # Use env varialbe instead of command line to avoid issues with blob
+        # names starting with "-", e.g. "-bz2"
+        env = {"BALROG_BLOB_SUFFIX": channel_config["bz2_blob_suffix"]}
+        auth = os.path.join(os.getcwd(), self.config['credentials_file'])
+        cmd = [
+            sys.executable,
+            os.path.join(dirs["abs_tools_dir"],
+                         "scripts/build-promotion/balrog-release-pusher.py")]
+        cmd.extend([
+            "--api-root", self.config["balrog_api_root"],
+            "--download-domain", self.config["download_domain"],
+            "--archive-domain", self.config["archive_domain"],
+            "--credentials-file", auth,
+            "--product", self.config["product"],
+            "--version", self.config["version"],
+            "--build-number", str(self.config["build_number"]),
+            "--app-version", self.config["appVersion"],
+            "--username", self.config["balrog_username"],
+            "--complete-mar-filename-pattern",
+            channel_config["complete_mar_filename_pattern"],
+            "--complete-mar-bouncer-product-pattern",
+            channel_config["complete_mar_bouncer_product_pattern"],
+            "--verbose",
+        ])
+
+        for v, build_number in self.query_matching_partials(channel_config):
+            if v < "56.0":
+                self.info("Adding %s to partials" % v)
+                partial = "{version}build{build_number}".format(
+                    version=v, build_number=build_number)
+                cmd.extend(["--partial-update", partial])
+            else:
+                self.info("Not adding %s to partials" % v)
+
+        for c in channel_config["channel_names"]:
+            cmd.extend(["--channel", c])
+        for r in channel_config["bz2_rules_to_update"]:
+            cmd.extend(["--rule-to-update", r])
+        for p in self.config["platforms"]:
+            cmd.extend(["--platform", p])
+        if channel_config["requires_mirrors"]:
+            cmd.append("--requires-mirrors")
+        if self.config["balrog_use_dummy_suffix"]:
+            cmd.append("--dummy")
+
+        self.retry(lambda: self.run_command(cmd, halt_on_failure=True, env=env))
+
 
 # __main__ {{{1
 if __name__ == '__main__':