Will an exported file work on another browser?

On the projects that document import, yes: Underground 2’s zip and dezm0n’s Files & saves manager. I am not claiming that for projects that never published an export button.

NFS Browser Saves: Where Progress Is Stored

A lost career is the complaint that shows up most often on the solo Most Wanted page. The fix depends on which project you opened.

Project	Where the save lives	How to keep a copy
Underground 2 Revived	Browser storage, plus an optional cloud slot opened with a passphrase (the notes say “nfsu2-” plus eight words). No email.	Zip backup and restore, documented in the playing notes. Clearing site data drops the local copy.
dezm0n Most Wanted	Browser storage. Autosave is a switch under Gameplay.	Files & saves → Manage, then export. Comments on the page describe lost careers around Blacklist 2 and a full 4 GB storage quota. Those are comments, not a measured failure rate.
NFSMW Online	An account on their server, one career per account.	The career is tied to the login. I do not have a published export format.
MWO	The MWO account.	Same: server-side. A browser clear does not describe their career slot.
Carbon (nfscrb)	Browser plus a cloud option mentioned on the FAQ.	Follow that FAQ’s own steps. I am not inventing a file extension.
NFS2WEB	The game’s own files on your disk.	There is no cloud slot. The save stays with the folder you selected.

NFS Browser Saves: Where Progress Is Stored

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