Firefox will soon alert you if your online accounts have been hacked

Despite data breaches occurring practically every other day, most people are unaware if their personal information has been leaked online or not. To help combat this, Troy Hunt, the creator of Have I Been Pwned (HIBP), has joined forces with Mozilla to add his massive database to future versions of Firefox.

The new feature, called Firefox Monitor, will be set up as a secondary site, giving more people access to the HIBP database in its entirety. Users can just enter their email address into Firefox Monitor to find out if their personal information has been compromised.

"This is major because Firefox has an install base of hundreds of millions of people," Hunt wrote in a blog post announcing the partnership, "which significantly expands the audience that can be reached once this feature rolls out to the mainstream."

Months in the making

In November last year, Mozilla announced that it was integrating the freely accessible HIBP database API into Firefox to alert users when their accounts were breached, but this was, in essence, just a notification system.

Firefox Monitor will, however, not only let users know of any known leaks, but also provide recommendations on how to secure their accounts. 

Mozilla is also considering setting up an alert system which would potentially notify users of new breaches, although this is still in its planning and testing stage. The internet company announced on Monday that it’s working with Cloudflare and HIBP to anonymize submitted user data to ensure privacy.

Firefox Monitor will begin rolling out next week to about 250,000 users (mostly in the US) for testing, with the service available to all users further down the line.

Sharmishta Sarkar
Managing Editor (APAC)

While she's happiest with a camera in her hand, Sharmishta's main priority is being TechRadar's APAC Managing Editor, looking after the day-to-day functioning of the Australian, New Zealand and Singapore editions of the site, steering everything from news and reviews to ecommerce content like deals and coupon codes. While she loves reviewing cameras and lenses when she can, she's also an avid reader and has become quite the expert on ereaders and E Ink writing tablets, having appeared on Singaporean radio to talk about these underrated devices. Other than her duties at TechRadar, she's also the Managing Editor of the Australian edition of Digital Camera World, and writes for Tom's Guide and T3.

Latest in Browsers
Woman using a Windows computer with Microsoft Edge
Don’t panic – Microsoft’s Edge browser isn’t about to subject you to a flood of unblocked adverts (not yet, anyway)
Google Chrome browser icon
A new split-screen feature is coming to Google Chrome, and it's surprisingly powerful
The Microsoft Edge logo on a black background displayed on a laptop screen.
Microsoft just gave Edge a great new feature to ensure the browser doesn’t slow down the PC, and it’s tempting me to switch from Google Chrome
Google Chrome with Christmas theme in Windows 11
I've used Edge, Firefox, and Opera, and yet after ten years in tech journalism, I still come back to Chrome
Woman using a Windows computer with Microsoft Edge
Microsoft gets rid of ‘Edge uninstall’ advice page after facing criticism over it having nothing to do with removing the app, and just promoting the browser instead
Microsoft Edge
Sorry, you're not getting Microsoft Edge off of your PC, at least according to its new 'uninstall' document
Latest in News
Google Pixel 9 Pro Fold main display opened
Apple is rumored to be prioritizing battery life on the foldable iPhone – which could also feature a liquid metal hinge for added durability
Google Pixel 9
The Google Pixel 10 just showed up in Android code – and may come with a useful speed boost
L-mount alliance
Sirui joins L-Mount Alliance to deliver its superb budget lenses for Leica, DJI, Sigma and Panasonic cameras
Security padlock and circuit board to protect data
Trust in digital services around the world sees a massive drop as security worries continue
A Lego Pikachu tail next to a Pebble OS watch and a screenshot of Assassin's Creed Shadow
ICYMI: the week's 7 biggest tech stories from LG's excellent new OLED TV to our Assassin's Creed Shadow review
Samuel and Romy standing very close together in A24's Babygirl movie
Everything new on Max in April 2025, including A24's Babygirl and The Last of Us season 2