# Tether Browser Extension

> Autofills OTPs on webpages using Tether daemon

Canonical page: [https://chrome-stats.com/d/tether-browser-extension](https://chrome-stats.com/d/tether-browser-extension)

## Overview

- **ID:** `tether-browser-extension`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** zackb
- **Category:** privacy-security
- **Daily users:** 46
- **Weekly downloads:** 38
- **Rating:** 5.00 / 5 (2 ratings)
- **Version:** 1.0.6
- **Last updated:** 2026-08-31
- **First published:** 2026-05-03
- **Size:** 81 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/tether-browser-extension/)
- **Website:** [https://github.com/zackb/tether](https://github.com/zackb/tether)

## Description

Tether can auto-fill OTP codes sent to Thunderbird and Betterbird, and send and receive files, text, clipboard to and from the iPhone or iPad. The Tether client must be installed for the extensions to utilize.
<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/7d96111293569dafd57aaad6cf162e866edf36cdf7459364f59ca334624c3334/https%3A//github.com/zackb/tether" rel="nofollow">https://github.com/zackb/tether</a>

## Rankings

- #17,575 — Overall
- #124 — browser extension

## Permissions and access

### Permissions

- `nativeMessaging`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [TOTP Authenticator](https://chrome-stats.com/d/totp-authenticator) — 576 users, 3.67 / 5
- [Auth Plus](https://chrome-stats.com/d/foxauth) — 41 users, 4.56 / 5
- [TOTP Viewer](https://chrome-stats.com/d/totp-viewer) — 3 users
- [TOTP Auth](https://chrome-stats.com/d/totp-auth) — 6 users
- [Brightery OTP Vault & Autofill](https://chrome-stats.com/d/brightery-otp-vault-autofill) — 12 users
- [TabAuth.in - Securely Lock Tabs using TOTP](https://chrome-stats.com/d/tabauth-in) — 5.00 / 5
- [TOTP](https://chrome-stats.com/d/totp) — 795 users, 4.64 / 5
- [TOTP Authenticator](https://chrome-stats.com/d/2fa-authenticator) — 13 users
- [Ultra OTP](https://chrome-stats.com/d/ultra-otp) — 1 users
- [2! Authenticator](https://chrome-stats.com/d/2-authenticator) — 16 users
- [AuthONE Extension](https://chrome-stats.com/d/authone-extension) — 1 users
- [Encryptio Password Manager](https://chrome-stats.com/d/encryptio-password-manager)

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Source: [Chrome-Stats](https://chrome-stats.com/d/tether-browser-extension)