diff --git a/README.md b/README.md
index 7d9cbbd..e3b281f 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,12 @@ This repository contains a small setup to automate the delivery of our root cert
 * `install.sh` copies the certificates to the right location and then reloads the system's certificates (Linux only)
 
 ### Firefox
-* On Mint, had to use the following so that Firefox uses system CAs:
+On Debian-based distros, the following is required so that Firefox uses system CAs. We add a diversion in dpkg so that
+Firefox upgrades do not override our change.
 ```
-sudo mv /usr/lib/firefox/libnssckbi.so /usr/lib/firefox/libnssckbi.so.bak
+sudo dpkg-divert --divert /usr/lib/firefox/libnssckbi.so.orig --rename --local /usr/lib/firefox/libnssckbi.so
 sudo ln -s /usr/lib/x86_64-linux-gnu/pkcs11/p11-kit-trust.so /usr/lib/firefox/libnssckbi.so
 ```
-* Stil unclear: Will this be overwritten at Firefox update?
 
 ### Kodi Android
 Since Android does not allow to import our root certificate, we have to import directly in Kodi: