Sadly it didn’t but I appreciate your help nonetheless. Never knew about this trick so it’ll come in handy for other things.
Discussion
Since it's nostr, your nsec should never leave your browser, cookies are created by servers
So the only two other locations I can think of is localstorage and indexeddb.
Try running this in your js-console
```
localStorage.clear()
```
That's all I have :'-)