Mozilla Blog

Firefox for iOS now available

If you’re an iPhone, iPad, or iPod touch user you’ll be happy to learn that Firefox for iOS is now available in the App Store worldwide. Firefox for iOS lets ...

Firefox Focus – a free, fast and easy to use private browser for iOS

Today, we’re pleased to announce the launch of Firefox Focus – a free, fast and easy to use private browser for iOS. We live in an age where too ma

Firefox extensions to make remote work and school a little better

If you are newly working or going to school from home, the remote approach can be a big shift in how to get things done. Firefox has a number of browser ex

Introducing Firefox Monitor, Helping People Take Control After a Data Breach

Data breaches, when information like your username and password are stolen from a website you use, are an unfortunate part of life on the internet today. I

Mozilla and Epic Announce Unreal Engine for the Web

Mozilla, a non-profit organization dedicated to promoting openness, innovation and opportunity on the Web, is advancing the Web as the platform for high-en

Update on Multi-Process Firefox

About four months ago, we launched multi-process Firefox to a small group of Firefox 48 users. Shortly after the carefully measured roll-out, we increased to approximately 50% of our user ...

Extensions in Firefox 59

Firefox Quantum continues to make news as Mozilla incorporates even more innovative technology into the platform. The development team behind the WebExtensions architecture is no exception, landing a slew of ...

Hey advertisers, track this

If it feels like the ads chasing you across the internet know you a little too well, it’s because they do (unless you’re an avid user of ad blockers, i

AdBlock Plus’s effect on Firefox’s memory usage

[Update: Wladimir Palant has posted a response on the AdBlock Plus blog. Also, a Chrome developer using the handle “Klathmon” has posted numerous good comments in the Reddit discussion of this post , explaining why ad-blockers are inherently CPU- and memory-intensive, and why integrating ad-blocking into a browser…

Mitigations landing for new class of timing attack

Several recently-published research articles have demonstrated a new class of timing attacks (Meltdown and Spectre) that work on modern CPUs. Our internal experiments confirm that it is possible to use ...

Site Isolation in Firefox

With Site Isolation enabled on Firefox for Desktop, Mozilla takes its security guarantees to the next level.

Firefox Containers Preview

Today, we’re excited to announce the Preview of Containers in Firefox version 153, which lets you keep separate parts of your online life (work, shopping

Update Regarding Add-Ons in Firefox

Incident summary Updates - Last updated 14:35 PST May 14, 2019. We expect this to be our final update. If you are running Firefox versions 61 - 65 ...

Focus by Firefox, a Content Blocker for iOS

Today we’re pleased to announce the launch of Focus by Firefox, a free content blocker for Safari users on iOS 9 that gives users greater control of their mobile Web ...

Firefox for Mobile now supports NoScript, PrivacyBadger, HTTPS Everywhere

Back in February, we announced support for the first extension for Firefox Preview, the new and rebuilt mobile browser for Android that is set to replace Firefox for Android later ...

Firefox to Discontinue Sideloaded Extensions

To give users more control over their extensions, support for sideloaded extensions will be phased out starting with Firefox 73.

New Thunderbird Releases and New Thunderbird Staff

Thunderbird is going strong at version 52 (ESR) and 57, 58 beta In April 2017 Thunderbird released its successful Extended Service Release (ESR) version 52. This release has just seen it’s fifth “dot update” 52.5.0, where fixes, stability and minor functionality improvements were shipped. Thunderbird 57 beta was also…

New Search Strategy for Firefox

Ten years ago, we built Firefox to keep the Internet in each of our hands — to create choice and put people in control of their lives online. Our focus h

Firefox introduces PDF viewer

Firefox for Windows, Mac and Linux introduces a built-in browser PDF viewer that allows you to read PDFs directly within the browser, making reading PDFs e

Firefox exploit found in the wild

Yesterday morning, August 5, a Firefox user informed us that an advertisement on a news site in Russia was serving a Firefox exploit that searched for sensitive files and uploaded ...

Introducing the ‘mozjpeg’ Project

Today I’d like to announce a new Mozilla project called ‘mozjpeg’. The goal is to provide a production-quality JPEG encoder that improves compression while maintaining compatibility with the vast majority ...

Update: Looking Glass Add-On

We didn’t think hard enough about how our actions would affect the community, and we’re sorry for letting you down. How we got here Over the co

Firefox 87 introduces SmartBlock for Private Browsing

Today, with the launch of Firefox 87, we are excited to introduce SmartBlock, a new intelligent tracker blocking mechanism for Firefox Private Browsing and Strict Mode. SmartBlock ensures that strong ...

Firefox profiles: Private, focused spaces for all the ways you browse

Every part of your life has its own rhythm: work, school, family, personal projects. Beginning Oct. 14, we’re rolling out a new profile management featur

Mozilla and Samsung Collaborate on Next Generation Web Browser Engine

Mozilla’s mission is about advancing the Web as a platform for all. At Mozilla Research, we’re supporting this mission by experimenting with what’s n

An Update on Firefox Containers

Containers is now available as a Firefox Extension, accessible to all Firefox users. Download Firefox Multi-Account Containers here. Back in June 2016, we started experimenting with “Containers” as a way to explore Contextual Identities on the web. Firefox Containers are a way for users to isolate their online…

What’s Next for Multi-Process Firefox

By Asa Dotzler and Brad Lassey Electrolysis is the project name for Mozilla's efforts to split Firefox into multiple processes to improve responsiveness, stability, and security. The first phase of ...

Lightspeed – A Browser Experiment

Another Big Milestone for Servo: Acid2

Servo, the next-generation browser engine being developed by Mozilla Research, has reached an important milestone by passing the Acid2 test. While Servo is not yet fully web compatible, passing Acid2 ...

Thunderbird in 2019

From the Thunderbird team we wish you a Happy New Year! Welcome to 2019, and in this blog post we’ll look at what we got accomplished in 2018 and look forward to what we’re going to be working on this year. Looking Back on 2018 More Eggs in the Nest Our team grew considerably in […]