Tips-&-Tricks.md

@@ -328,6 +328,14 @@ Source: <https://docs.flatpak.org/en/latest/tips-and-tricks.html#adding-a-custom
 > $ flatpak --installation=extra install flathub org.inkscape.Inkscape
 > ```
 
+If you use Flatseal to manage Flatpak permissions, [apps may not be listed](https://github.com/tchx84/Flatseal/issues/502) and you will need to grant Flatseal the `host:ro` filesystem permission.
+
+[Flatseal Documentation](https://github.com/tchx84/Flatseal/blob/master/DOCUMENTATION.md#use-custom-flatpak_user_dir)
+
+```sh
+flatpak --user override --filesystem=host:ro com.github.tchx84.Flatseal
+```
+
 ### Add App to favorites:
 
 To add an app from your app list to the Favorites section (i.e. pin to the top of the list), long-press on the app, then select `Add to Favorites`. The Favorites section expands to accommodate the new favorite app. To remove an app from Favorites, long-press the app, then select `Remove from Favorites`.