diff --git a/firefox_preferences/dark_reader_pdf.txt b/firefox_preferences/dark_reader_pdf.txt
index 77266da0..15196461 100644
--- a/firefox_preferences/dark_reader_pdf.txt
+++ b/firefox_preferences/dark_reader_pdf.txt
@@ -1,4 +1 @@
-# To get dark reader on pdf in firefox, simply hit F12, and paste this into the console:
-
 javascript:(function(){viewer.style = 'filter: grayscale(1) invert(1) sepia(1) contrast(75%)';})()
-