Azure Storage Explorer: sign-in does not open the browser

Updated 18 August 2026

Clicking Sign in does nothing visible. No window, no tab, no error. The app is waiting on a browser it never managed to open.

Why it happens

Sign-in is a redirect flow: Storage Explorer opens your default browser, you authenticate there, and the browser hands a token back to the app on a local port. Three things break that chain, in order of how often they do:

• The default browser cannot be launched by the app — most common on machines where the default is set to something unusual, or to a browser installed per-user while the app runs elevated.
• The local callback port is blocked by endpoint security software, so the browser opens but the token never arrives.
• A proxy sits in front and rewrites or blocks the redirect.

What to try, in order

1. Set Edge or Chrome as the default browser and open it before signing in.
2. Do not run Storage Explorer as administrator. Elevated apps often cannot see the user's browser profile.
3. Help → Clear Cache, then restart.
4. If you are on a corporate network, ask whether the proxy is NTLM. Storage Explorer supports basic proxy authentication only.

Skip the browser step

You can attach a storage account directly with an access key or SAS token, which uses no browser at all. Portal → storage account → Security + networking → Access keys, then in Storage Explorer use Connect → Storage account or service.

Keys are full-access credentials for that account. Store them in a password manager, not in a project file, and rotate them if one leaks.