diff --git a/addons/web/static/src/css/base.sass b/addons/web/static/src/css/base.sass
index 361914b3578..959be8071a1 100644
--- a/addons/web/static/src/css/base.sass
+++ b/addons/web/static/src/css/base.sass
@@ -2273,6 +2273,8 @@ $sheet-padding: 16px
                         border-width: 0
                 > td.oe_list_field_boolean input
                     @include opacity()
+                > td.oe_list_field_boolean input:-moz-read-only
+                    @include opacity(1.0)
             > tr:nth-child(odd)
                 background-color: #f0f0fa
                 @include vertical-gradient(#f0f0fa, #eeeef6)