diff --git a/1.3-Implementation.md b/1.3-Implementation.md
index d952e44..1d5b847 100644
--- a/1.3-Implementation.md
+++ b/1.3-Implementation.md
@@ -30,7 +30,7 @@
   * If you block all cookies by default, then you will need to allow a cookie exception for some Extensions, including uBlock Origin, uMatrix, Stylus, and Violentmonkey
   * See [Setting Extension Permission Exceptions](https://github.com/ghacksuserjs/ghacks-user.js/wiki/4.1.1-Setting-Extension-Permission-Exceptions)
 - First Party Isolation (4001) is enabled by default
-   * Cookie extensions currently cannot control persistent storage with FPI Origin Attributes <sup>[1381197](https://bugzilla.mozilla.org/show_bug.cgi?id=1381197)</sup>
+   * In FF58 and lower, cookie extensions cannot control persistent storage with FPI Origin Attributes <sup>[1381197 fixed in FF59](https://bugzilla.mozilla.org/show_bug.cgi?id=1381197)</sup>
 
 :exclamation: REALLY IMPORTANT: privacy.resistFingerprinting (RFP)