diff --git a/README.md b/README.md
index ea66a77..8c41c82 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Important settings are enforced/locked within `mozilla.cfg`, those settings cann
 ## Installation:
 
 - Clone or download zip file and extract it
-- Locate Firefox's installation directory `/usr/lib/firefox-esr/`
+- Locate Firefox's installation directory `/usr/lib/firefox-esr/` or `/usr/lib/firefox/`
 - Copy the files contained in `config` folder to the install directory
 - Start Firefox and test if config was applied browsing to `about:config`.