diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
index 8c2a7564b..15d5d3630 100644
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -2,11 +2,13 @@
 <!-- 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/. -->
-<resources>
+<resources xmlns:tools="http://schemas.android.com/tools">
     <dimen name="crash_reporter_close_tab_button_horizontal_margin">26dp</dimen>
     <dimen name="crash_reporter_close_tab_button_bottom_margin">24dp</dimen>
     <dimen name="glyph_button_height">48dp</dimen>
     <dimen name="glyph_button_width">48dp</dimen>
+    <dimen name="mozac_browser_menu_width_min" tools:ignore="UnusedResources">250dp</dimen>
+    <dimen name="mozac_browser_menu_width_max" tools:ignore="UnusedResources">314dp</dimen>
     <dimen name="mozac_browser_menu_corner_radius">8dp</dimen>
     <dimen name="toolbar_elevation">7dp</dimen>
     <dimen name="library_item_height">56dp</dimen>