# Block Sender for Gmail

> Block annoying emails in Gmail. Say goodbye to unwanted newsletters, individuals, and other uninvited email senders.

Canonical page: [https://chrome-stats.com/d/block-sender-for-gmail](https://chrome-stats.com/d/block-sender-for-gmail)

## Overview

- **ID:** `block-sender-for-gmail`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Block Sender
- **Category:** privacy-security,social-communication,other
- **Daily users:** 229
- **Weekly downloads:** 5
- **Rating:** 2.78 / 5 (9 ratings)
- **Version:** 4.5.1
- **Last updated:** 2020-12-22
- **First published:** 2014-06-02
- **Size:** 2.46 MB
- **Data as of:** 2026-09-13
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/block-sender-for-gmail/)
- **Website:** [http://help.blocksender.io](http://help.blocksender.io/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/block-sender-for-gmail/privacy/](https://addons.mozilla.org/firefox/addon/block-sender-for-gmail/privacy/)

## Description

Block Sender for Gmail is an easy-to-use Firefox Add-on that enables you to block annoying emails in Gmail. With one click, you can permanently block any email address, domain, subject line, or keyword. It also allows you to send a fake error message to the sender's inbox. Say goodbye to unwanted newsletters, individuals, and other uninvited email senders with Block Sender for Gmail.

## Rankings

- #7,784 — Overall
- #159 — wa sender
- #166 — gmail

## Permissions and access

### Permissions

- `*://*.blocksender.io/*`
- `https://mail.google.com/*`
- `tabs`
- `storage`
- `webRequest`
- `webRequestBlocking`
- `notifications`
- `alarms`

### Content script matches

- `mail.google.com`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions 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).

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Source: [Chrome-Stats](https://chrome-stats.com/d/block-sender-for-gmail)