--- a/release/docker/funsize-update-generator/scripts/funsize.py
+++ b/release/docker/funsize-update-generator/scripts/funsize.py
@@ -18,16 +18,17 @@ from mardor.marfile import MarFile
 log = logging.getLogger(__name__)
 ALLOWED_URL_PREFIXES = [
     "http://download.cdn.mozilla.net/pub/mozilla.org/firefox/nightly/",
     "http://download.cdn.mozilla.net/pub/firefox/nightly/",
     "https://mozilla-nightly-updates.s3.amazonaws.com",
     "https://queue.taskcluster.net/",
     "http://ftp.mozilla.org/",
     "http://download.mozilla.org/",
+    "https://archive.mozilla.org/",
 ]
 
 DEFAULT_FILENAME_TEMPLATE = "{appName}-{branch}-{version}-{platform}-" \
                             "{locale}-{from_buildid}-{to_buildid}.partial.mar"
 
 
 def verify_signature(mar, signature):
     log.info("Checking %s signature", mar)