diff --git a/firefox_notes.txt b/firefox_notes.txt
index b40aad25..4245b115 100644
--- a/firefox_notes.txt
+++ b/firefox_notes.txt
@@ -5,6 +5,7 @@ article and Unix Sheikh's Choose your Browser Carefully article):
 Install Ublock Origin
 Install Decentraleyes
 Install Canvas Blocker (on librewolf no need)
+Install Colorzilla
 Install Measure-it
 Install FastForward
 Install Firefox Translations