diff --git a/LicheePi4A.md b/LicheePi4A.md
index ea9b0cf..b6a0b2b 100644
--- a/LicheePi4A.md
+++ b/LicheePi4A.md
@@ -33,6 +33,14 @@ At bottom:
 
 Currently I'm typing to Firefox running on this LicheePi 4A, logged into Locals. Also compiling TSC https://secretchronicles.org/ and Godot.
 
+## Do not install updates to internal drive
+
+Updating to newer kernel messes up drivers, so do not `apt upgrade` or `apt dist-upgrade`. Only do `apt update`, and install only minimal required packages, because internal 8 GB drive is very small.
+
+## Firefox sometimes segfaults
+
+So maybe use some other computer for Firefox.
+
 ## Chroot
 
 Because internal 8 GB storage is too small to install packages, I am using external USB3 SSD drive where I add Chroot of newest Debian Sid RISC-V.