--- a/taskcluster/docker/firefox-snap/runme.sh
+++ b/taskcluster/docker/firefox-snap/runme.sh
@@ -43,16 +43,17 @@ locales=$(python3 "$SCRIPT_DIRECTORY/ext
 mkdir -p "$DISTRIBUTION_DIR/extensions"
 for locale in $locales; do
     $CURL -o "$SOURCE_DEST/distribution/extensions/langpack-${locale}@firefox.mozilla.org.xpi" \
         "$CANDIDATES_DIR/${VERSION}-candidates/build${BUILD_NUMBER}/linux-x86_64/xpi/${locale}.xpi"
 done
 
 # Generate snapcraft manifest
 sed -e "s/@VERSION@/${VERSION}/g" -e "s/@BUILD_NUMBER@/${BUILD_NUMBER}/g" snapcraft.yaml.in > "${WORKSPACE}/snapcraft.yaml"
+cp -v "$SCRIPT_DIRECTORY/mime{-handler.xml,apps.list}" "$WORKSPACE"
 cd "${WORKSPACE}"
 snapcraft
 
 mv -- *.snap "$TARGET_FULL_PATH"
 
 cd "$ARTIFACTS_DIR"
 
 # Generate checksums file