diff --git a/build/patches/Partition-Blink-memory-cache.patch b/build/patches/Partition-Blink-memory-cache.patch
index 4decfb2d..92ff8614 100644
--- a/build/patches/Partition-Blink-memory-cache.patch
+++ b/build/patches/Partition-Blink-memory-cache.patch
@@ -4,6 +4,9 @@ Subject: Partition Blink memory cache
 
 Blink's in-memory cache is not partitioned (see also: http://crbug.com/1127971)
 This patch partitions it by the top-level site.
+This mitigation is effective in case the rendering process is re-used, because
+on such case the cache would be re-used as well and transfer information between
+different contexts.
 
 See also:
 * https://github.com/bromite/bromite/pull/2173