Uploading an Add-on
To add one or more Extensions to your implementation of Tridion Sites, in the Add-ons screen, upload an Add-on package, that is, a ZIP file containing the Extensions. If the ID of the Add-on is the same as that of an Add-on that was previously uploaded, it will be considered an update of that Add-on. Some Add-ons require a separate configuration to be uploaded before the Add-on can be used.
Procedure
Results
If your package contains a GUI extension, that is, a custom Editor or a custom Model or both, all users of the affected user interface(s) see a notification on their screen telling them that a new extension was uploaded, and instructing them to refresh their browser to start using the extension.