Familiar Emails Firefox

Familiar Emails

Get a warning for any email addresses you aren't familiar with

Features & Capabilities

Introduction

In your inbox, see an icon by email addresses to indicate whether they are familiar or not. This can help reduce security problems like phishing by reminding you to reconsider unfamiliar emails from email addresses. You can mark individual emails as familiar, or many with the * wildcard. Thus, you can use patterns like *@example.com or @.example.com to mark many email addresses as familiar.

Features

Supported Websites • Gmail

Edit Familiar Email Addresses • An interface to edit the email addresses which you consider to be familiar

Familiar/Unfamiliar Email Address Indicator • An icon appears next to each email address

Storage Sync • Options saved for use on any computer

Instructions

Configure Keyboard Shortcut

  1. Click the icon for this extension
  2. Click "Keyboard shortcuts"
  3. Make a keyboard shortcut for "Big options page" or "Activate the extension"

Add Email Address

  1. Open the big options page or the popup
  2. Go to the field "Add email address"
  3. Type in a URL like the following • Normal: coworker@marketing.example.com • Wildcard: @marketing.example.com or @*.example.com
  4. Hit enter or click the plus button

User Growth & Download Statistics

Manifest V3 Add-on
By:
Robustus
Daily users:
-
Version:
4.1 Last updated: 2026-07-08
Version code:
6345024
Creation date:
2026-05-22
Risk:
Moderate risk impact High risk likelihood
Permissions:
Content scripts matches:
  • mail.google.com
Size:
109.65KB
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-07-15
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Robustus
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/familiar-emails/

Is Familiar Emails Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Familiar Emails requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Request access to the following domains: google.com
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Familiar Emails is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
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