Add new prefixes to Preferences policy

diff --git a/README.md b/README.md
index 5c0a54ddbee7f100ad346ca1beda5fe8ac73197f..d12ecc51728d10552060f4cd4b70c3ce3a6a4c5a 100644 (file)
--- a/README.md
+++ b/README.md
@@ -3945,9 +3945,11 @@ intl.
 layout.
 media.
 network.
+pdfjs. (Firefox 84, Firefox ESR 78.6)
 places.
 print.
 signon. (Firefox 83, Firefox ESR 78.5)
+spellchecker. (Firefox 84, Firefox ESR 78.6)
 ui.
 widget.
 ```