diff --git a/docs/INSTALL_FIREFOX.md b/docs/INSTALL_FIREFOX.md
index e3427f1..cd6cceb 100644
--- a/docs/INSTALL_FIREFOX.md
+++ b/docs/INSTALL_FIREFOX.md
@@ -6,4 +6,7 @@
 3. Go to `about:debugging`
 4. Select `This Firefox`
 5. Click `Load Temporary Add-on...` > select downloaded ZIP archive (should me `LittleHome-main.zip`)
-6. Enjoy your new tab/home page
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+6. Enjoy your new tab/home page
+
+# Warning
+After browser restart - extension will be deleted!
\ No newline at end of file