Load and save xml on saas by Arbortext

Hi,

I am working on custom application for sync xml doc in our Saas application from Arbortext.
- The document xml should be open by a user on web navigator, with customizations files for arbortext.
- Arbortext start, user edits and saves, then a script sends to our Saas API
The downloading and opening process should be the most easy for the user with minimal interaction.
Which is the best customizations type in Arbortext for achieve the goal ?

I think to use arbortext-editor protocol + custom application with jar to download the xml and cutomizations files.
- We ask to our users to add our saas url in trusted site zone
- My Saas application references a link "arbortext-editor" with unique uuid generated for each edition, it allows to avoid authentification system for the url.
- Arbortext intercepts this link, then it calls our custom application that use a jar to download a zip file (xml + customizations + tokens authent) by http request.
- User saves the document, callback function uploads the document in our application.

Does it exist another method that arbortext-editor to avoid the configuration of trusted zone on clients side ?