It could allow transparent use of Firefox and Chromium data with the same account with history, passwords, bookmarks shared and the rest of the options and add-ons segregated by browser.
Firefox sync also has "Send Tabs", which -to me- is a great feature.
[1]: https://support.brave.com/hc/en-us/articles/360047642371-Syn...
The official service hosted by Brave is only intended to be used with Brave Browser
It boggles my mind when people recommend Brave in a privacy/security context.
Source?
The server implementation for sync is mostly compatible with Chromium and can be used without Brave. Someone could clone https://github.com/brave/go-sync and stand up their own server. It would require some patches on top of Chromium (similar to what is done in Brave) to implement the authentication - but once that is done, all of the Chromium tools like chrome://sync-internals work just fine