README: Add note about Manifest V2 unreliability

1 files changed, 2 insertions, 1 deletions

diff --git a/README.md b/README.md
index 6d1de7a..52c7955 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,8 @@ development.
 Communicates with Chrome over the [DevTools Protocol].
 
 This program is a rewrite of [Extreload] to add support for Manifest V3
-extensions.
+extensions. Swextreload doesn’t work reliably with Manifest V2 extensions, so
+you may want to continue using Extreload in that case.
 
 
 ## Usage