diff --git a/browser_patches/checkout_build_archive_upload.sh b/browser_patches/checkout_build_archive_upload.sh
index bbf6263cab..233e20d184 100755
--- a/browser_patches/checkout_build_archive_upload.sh
+++ b/browser_patches/checkout_build_archive_upload.sh
@@ -165,33 +165,6 @@ elif [[ "$BUILD_FLAVOR" == "chromium-with-symbols-linux-arm64" ]]; then
   BUILD_BLOB_NAME="chromium-with-symbols-linux-arm64.zip"
   BUILDS_LIST="EXPECTED_BUILDS_WITH_SYMBOLS"
 
-
-# ===========================
-#    CHROMIUM MIRRORING
-# ===========================
-elif [[ "$BUILD_FLAVOR" == "chromium-linux-mirror-to-cdn" ]]; then
-  BROWSER_NAME="chromium"
-  EXTRA_BUILD_ARGS="--mirror-linux"
-  EXTRA_ARCHIVE_ARGS="--mirror-linux"
-  EXPECTED_HOST_OS="Ubuntu"
-  EXPECTED_HOST_OS_VERSION="18.04"
-  BUILD_BLOB_NAME="chromium-linux.zip"
-elif [[ "$BUILD_FLAVOR" == "chromium-mac-mirror-to-cdn" ]]; then
-  BROWSER_NAME="chromium"
-  EXTRA_BUILD_ARGS="--mirror-mac"
-  EXTRA_ARCHIVE_ARGS="--mirror-mac"
-  EXPECTED_HOST_OS="Ubuntu"
-  EXPECTED_HOST_OS_VERSION="18.04"
-  BUILD_BLOB_NAME="chromium-mac.zip"
-elif [[ "$BUILD_FLAVOR" == "chromium-win64-mirror-to-cdn" ]]; then
-  BROWSER_NAME="chromium"
-  EXTRA_BUILD_ARGS="--mirror-win64"
-  EXTRA_ARCHIVE_ARGS="--mirror-win64"
-  EXPECTED_HOST_OS="Ubuntu"
-  EXPECTED_HOST_OS_VERSION="18.04"
-  BUILD_BLOB_NAME="chromium-win64.zip"
-
-
 # ===========================
 #    FIREFOX COMPILATION
 # ===========================
diff --git a/browser_patches/chromium/build.sh b/browser_patches/chromium/build.sh
index d7e41b5e71..f8306e5810 100755
--- a/browser_patches/chromium/build.sh
+++ b/browser_patches/chromium/build.sh
@@ -6,9 +6,9 @@ trap "cd $(pwd -P)" EXIT
 cd "$(dirname "$0")"
 
 USAGE=$(cat<<EOF
-  usage: $(basename "$0") [--mirror|--mirror-linux|--mirror-win64|--mirror-mac|--compile-mac-arm64|--compile-linux|--compile-linux-arm64|--compile-win64|--compile-mac] [--symbols] [--full]
+  usage: $(basename "$0") [--compile-mac-arm64|--compile-linux|--compile-linux-arm64|--compile-win64|--compile-mac] [--symbols] [--full]
 
-  Either compiles chromium or mirrors it from Chromium Continuous Builds CDN.
+  Compiles chromium.
 EOF
 )
 
@@ -19,8 +19,6 @@ main() {
   if [[ $1 == "--help" || $1 == "-h" ]]; then
     echo "$USAGE"
     exit 0
-  elif [[ $1 == "--mirror"* ]]; then
-    mirror_chromium "$1"
   elif [[ $1 == "--compile"* ]]; then
     compile_chromium "$1" "$2" "$3"
   else
@@ -115,45 +113,4 @@ compile_chromium() {
   fi
 }
 
-mirror_chromium() {
-  cd "$SCRIPT_FOLDER"
-  rm -rf output
-  mkdir -p output
-  cd output
-
-  CHROMIUM_URL=""
-
-  PLATFORM="$1"
-  if [[ "${PLATFORM}" == "--mirror" ]]; then
-    CURRENT_HOST_OS="$(uname)"
-    if [[ "${CURRENT_HOST_OS}" == "Darwin" ]]; then
-      PLATFORM="--mirror-mac"
-    elif [[ "${CURRENT_HOST_OS}" == "Linux" ]]; then
-      PLATFORM="--mirror-linux"
-    elif [[ "${CURRENT_HOST_OS}" == MINGW* ]]; then
-      PLATFORM="--mirror-win64"
-    else
-      echo "ERROR: unsupported host platform - ${CURRENT_HOST_OS}"
-      exit 1
-    fi
-  fi
-
-  CRREV=$(head -1 "${SCRIPT_FOLDER}/BUILD_NUMBER")
-  if [[ "${PLATFORM}" == "--mirror-win64" ]]; then
-    CHROMIUM_URL="https://storage.googleapis.com/chromium-browser-snapshots/Win_x64/${CRREV}/chrome-win.zip"
-  elif [[ "${PLATFORM}" == "--mirror-mac" ]]; then
-    CHROMIUM_URL="https://storage.googleapis.com/chromium-browser-snapshots/Mac/${CRREV}/chrome-mac.zip"
-  elif [[ "${PLATFORM}" == "--mirror-linux" ]]; then
-    CHROMIUM_URL="https://storage.googleapis.com/chromium-browser-snapshots/Linux_x64/${CRREV}/chrome-linux.zip"
-  else
-    echo "ERROR: unknown platform to build: $1"
-    exit 1
-  fi
-
-  echo "--> Pulling Chromium ${CRREV} for ${PLATFORM#--}"
-
-  curl --output chromium-upstream.zip "${CHROMIUM_URL}"
-  unzip chromium-upstream.zip
-}
-
 main "$1" "$2" "$3"
diff --git a/browser_patches/chromium/mirror.sh b/browser_patches/chromium/mirror.sh
new file mode 100755
index 0000000000..467db2d66b
--- /dev/null
+++ b/browser_patches/chromium/mirror.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+set -e
+set +x
+
+trap "cd $(pwd -P)" EXIT
+cd "$(dirname "$0")"
+
+USAGE=$(cat<<EOF
+  usage: $(basename "$0") [--linux|--win64|--mac]
+
+  Mirrors Chromium from Chromium Continuous Builds CDN.
+EOF
+)
+
+SCRIPT_FOLDER=$(pwd -P)
+source "${SCRIPT_FOLDER}/../utils.sh"
+
+main() {
+  if [[ $1 == "--help" || $1 == "-h" ]]; then
+    echo "$USAGE"
+    exit 0
+  else
+    mirror_chromium "$1"
+  fi
+}
+
+mirror_chromium() {
+  cd "$SCRIPT_FOLDER"
+  rm -rf output
+  mkdir -p output
+  cd output
+
+  CHROMIUM_URL=""
+
+  PLATFORM="$1"
+  if [[ -n "${PLATFORM}" ]]; then
+    CURRENT_HOST_OS="$(uname)"
+    if [[ "${CURRENT_HOST_OS}" == "Darwin" ]]; then
+      PLATFORM="--mac"
+    elif [[ "${CURRENT_HOST_OS}" == "Linux" ]]; then
+      PLATFORM="--linux"
+    elif [[ "${CURRENT_HOST_OS}" == MINGW* ]]; then
+      PLATFORM="--win64"
+    else
+      echo "ERROR: unsupported host platform - ${CURRENT_HOST_OS}"
+      exit 1
+    fi
+  fi
+
+  CRREV=$(head -1 "${SCRIPT_FOLDER}/BUILD_NUMBER")
+  if [[ "${PLATFORM}" == "--win64" ]]; then
+    CHROMIUM_URL="https://storage.googleapis.com/chromium-browser-snapshots/Win_x64/${CRREV}/chrome-win.zip"
+  elif [[ "${PLATFORM}" == "--mac" ]]; then
+    CHROMIUM_URL="https://storage.googleapis.com/chromium-browser-snapshots/Mac/${CRREV}/chrome-mac.zip"
+  elif [[ "${PLATFORM}" == "--linux" ]]; then
+    CHROMIUM_URL="https://storage.googleapis.com/chromium-browser-snapshots/Linux_x64/${CRREV}/chrome-linux.zip"
+  else
+    echo "ERROR: unknown platform to build: $1"
+    exit 1
+  fi
+
+  echo "--> Pulling Chromium ${CRREV} for ${PLATFORM#--}"
+
+  curl --output chromium-upstream.zip "${CHROMIUM_URL}"
+  unzip chromium-upstream.zip
+}
+
+main "$1" "$2" "$3"