Chats gone after signing in to new browser

[raw quarry]

All of my previous chats have disappeared since I signed in to a new browser. I can click New Room, and it is empty. When I go in to my activity and try to access my chats from there, it never goes to the chat I had.
I need these back.

[hallow rune]

All chats are stored locally, not on OpenRouter servers

If you still have access to the old browser, you can export the chats and import them into the new browser