diff --git a/README.md b/README.md
index 751f7bf..d1ecdc3 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,21 @@ safebrowsing.googleapis.com, safebrowsing.google.com, malware-error.mozilla.com,
 https://github.com/mozilla-mobile/fenix/issues/14163
 
 
+## Known problems
+
+`Some breakage?`
+
+Try changing "network.http.referer.XOriginPolicy" from 2 to 1
+
+`Performance loss?`
+
+Change these strings from false to true:
+
+javascript.options.ion
+
+javascript.options.baselinejit
+
+javascript.options.native_regexp
 
 
 ## Thanks