From 99882cacd0ac987a4d3939909dde4297f4ec1345 Mon Sep 17 00:00:00 2001
From: Raymond Hill <rhill@raymondhill.net>
Date: Sun, 12 Dec 2021 11:31:31 -0500
Subject: [PATCH] Truncate support information when too many lists are added

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1852
---
 src/js/messaging.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/js/messaging.js b/src/js/messaging.js
index 33dab03c2..3094a1286 100644
--- a/src/js/messaging.js
+++ b/src/js/messaging.js
@@ -1304,6 +1304,13 @@ const getSupportData = async function() {
     }
     if ( Object.keys(addedListset).length === 0 ) {
         addedListset = undefined;
+    } else if ( Object.keys(addedListset).length > 20 ) {
+        const added = Object.keys(addedListset);
+        const truncated = added.slice(20);
+        for ( const key of truncated ) {
+            delete addedListset[key];
+        }
+        addedListset[`[${truncated.length} lists not shown]`] = '[too many]';
     }
     if ( Object.keys(removedListset).length === 0 ) {
         removedListset = undefined;