FAQ
How to enable JavaScript APIs in MMR?
above v5.32.43 Go to Settings > Modules & Permission > {module} > Check any of the both options
below v5.32.43 Go to Settings > Security > Allow JavaScript API > {module} > Check any of the both options
NOTE
This feature was removed in v33348 and it's no longer present in newer MMRL versions
How to add a WebUI as shortcut?
WebUI's can only be added as shortcut if the developer support it.
If a WebUI supports it you can hold the module card to add it as shortcut.