Hi ,Serigo please check this also

 https://www.odoo.com/documentation/16.0/applications/general/developer_mode.html?highlight=developer mode developer mode asset

the developer mode and developer mode with assets are two different modes that can be used for development and customization of the software.

• Developer mode: This mode allows developers to make changes to the source code of the Odoo application, and is typically used for customizing the functionality of the software. This mode is not suitable for production use. When developer mode is enabled, the Odoo server will automatically reload the Python code on each request, allowing for rapid development and testing.

• Developer mode with assets: This mode is similar to the developer mode, but also enables the automatic compilation of assets (CSS and JavaScript) on the fly. This mode is also not suitable for production use.

Both modes can be enabled in the Odoo configuration file, by setting the debug_mode option to True. If you want to use the developer mode with assets, you need to set the assets_debug option to True.

It's important to note that while developer mode and developer mode with assets are useful for development and customization, they can have a significant impact on performance, so they should not be used in production environments.

Hello Sergio. When you google "developer mode with assets" you find a lot of answers like this one: https://www.odoo.com/de_DE/forum/hilfe-1/what-is-the-difference-between-activate-the-developer-mode-and-activate-the-developer-mode-with-assets-125093