diff --git a/README.md b/README.md
index 29275a8..92fd4f8 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@
 + You need `bash` to run it.
 + If you have an existing chrome folder, the script will make a backup of it in your profile directory.
 + If the installation script is not working, feel free to submit an issue or a pull request.
-+ The script will move a file named `user.js` that contains all the preferences needed for blurredfox to work. If you have a current one, make sure to create a backup.
++ The script will move a file named `user.js` that contains all the preferences needed for blurredfox to work. The existing one will be copied to `user.js.bak`.
 
 1. Run the script below. If you are using a different build like nightly, beta, etc., make sure to replace the 'stable' with the Firefox Build you are using. If leave empty, it will default to stable.
 
diff --git a/install.sh b/install.sh
index 30b9d23..08fd2ec 100755
--- a/install.sh
+++ b/install.sh
@@ -22,6 +22,13 @@ download_bf() {
 		FF_THEME="/tmp/blurredfox-master/"
 		cp -r "${FF_THEME}"* "${CHROME_DIRECTORY}"
 
+		# Backup user.js instead of overwriting it
+		if [ -e "${CHROME_DIRECTORY}/user.js" ]
+		then
+			message "[>>] Backing up user.js to user.js.bak..."
+			cp "${CHROME_DIRECTORY}/user.js" "${CHROME_DIRECTORY}/user.js.bak"
+		fi
+
 		# Move user.js to the main profile directory
 		mv "${CHROME_DIRECTORY}/user.js" "../"