Firebase Auth Switcher

by alexander.drossel · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 16 Oct 2026

Switch between Firebase Auth Emulator users with one click

Users

−1 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#259K

#216K among extensions

Version

0.1.0

updated 12 May 2026

Users

monthly, 5 months

Latest, 16 Oct 2026: 5 usersMove the mouse over the chart for any month

Ratings count

monthly, 5 months

Latest, 16 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Firebase Auth Switcher

A developer tool for projects using the Firebase Auth Emulator. Open the popup, search your emulator users, and click one to sign in as them — instantly and without touching your app's code. How it works: • Lists all users from your local Firebase Auth Emulator • Forges a custom token (the emulator skips signature validation) and exchanges it for a real ID token • Writes the auth state directly into your app's IndexedDB and reloads the page Setup: Open the extension settings and enter your emulator host, port, project ID, and Firebase API key. That's it. Note: This extension only works with the Firebase Auth Emulator on localhost. It is not intended for use with production Firebase projects.