# In browser authenticator This solution is perfect for users without a smart phone. This guide shows how to use it with git.math.uzh.ch, but the steps are the same for other pages. ### Install the authenticator extension
Extension name**authenticator.cc**
Available for\[\[[https://addons.mozilla.org/en-US/firefox/addon/auth-helper?src=external-github|](https://addons.mozilla.org/en-US/firefox/addon/auth-helper?src=external-github|)\[FrontPage/firefox-add-ons.png\]\]\]
\[\[[https://chrome.google.com/webstore/detail/authenticator/bhghoamapcdpbohphigoooaddinpkbai|](https://chrome.google.com/webstore/detail/authenticator/bhghoamapcdpbohphigoooaddinpkbai|)\[FrontPage/chrome-web-store.png\]\]\]
\[\[[https://microsoftedge.microsoft.com/addons/detail/ocglkepbibnalbgmbachknglpdipeoio|](https://microsoftedge.microsoft.com/addons/detail/ocglkepbibnalbgmbachknglpdipeoio|)\[FrontPage/microsoft-store.png\]\]\]
\[\[[https://apps.apple.com/us/app/authen/id1602945200?mt=12|](https://apps.apple.com/us/app/authen/id1602945200?mt=12|)\[FrontPage/apple-store.svg\]\]\]
Install the extension from the appropriate store using the above links. The most up-to-date links are provided on the official github page of the extension: [https://github.com/Authenticator-Extension/Authenticator?tab=readme-ov-file#available-for-chrome-firefox-microsoft-edge-and-safari](https://github.com/Authenticator-Extension/Authenticator?tab=readme-ov-file#available-for-chrome-firefox-microsoft-edge-and-safari) ### Register the extension for MFA with a QR code 1. Scan the QR code with the extension by pressing the scan icon [![in-browser-mfa-reg-1.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-reg-1.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-reg-1.png) 1. Select the area of the page with the QR code [![in-browser-mfa-reg-2.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-reg-2.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-reg-2.png) 1. The page will ask you for a code generated by the authenticator app - see below how to get the code [![in-browser-mfa-reg-3.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-reg-3.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-reg-3.png) **Note**: If you want to use the extension in several places (e.g. both FireFox in a ThinLink session and an authenticator app on you smart phone or a browser on your personal laptop), please save the secret key provided along with the QR code. You can use the code to configure the extension in other places. **The code is saved nowhere and once you close the page (or provide the code as in the last step above) it is not possible to access it again**. ### Usage 1. Provide login credentials on the page. [![in-browser-mfa-usage-1.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-usage-1.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-usage-1.png) 1. When asked for the token: 1. Open the authenticator extension and click on the proper entry to copy the code to the clipboard. You should see "Copied" displayed over this entry. [![in-browser-mfa-usage-2.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-usage-2.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-usage-2.png) 1. Paste the code on the page (e.g. with Ctrl+V). [![in-browser-mfa-usage-3.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-usage-3.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-usage-3.png) **Note**: On the first time the browser will ask you to permit the extension to use the clipboard - please allow it. If you choose otherwise, you can still copy the code manually (select then press Ctrl+C) or enter it manually on the page. ### Remove an app from the extension 1. Click on the extension icon, then the pen icon [![in-browser-mfa-edit-1.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-edit-1.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-edit-1.png) 1. Edit app properties and save by clicking the tick icon or remove the app by click the red disk icon [![in-browser-mfa-edit-2.png](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-edit-2.png)](https://wiki.math.uzh.ch/public/uploads/images/gallery/2026-06/in-browser-mfa-edit-2.png)