Mozilla Blog

Site Isolation in Firefox

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

Mozilla Re-Files Suit Against FCC to Protect Net Neutrality

This morning, the Federal Communications Commission officially published its order overturning net neutrality rules in the Federal Register. We had origina

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 ...

When it comes to privacy, default settings matter

What if I told you that on nearly every single website you visit, data about you was transmitted to dozens or even hundreds of companies, all so that the w

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 ...

Mozilla.ai: Investing in Trustworthy AI

We’re committing $30M to build Mozilla.ai: A startup — and a community — building a trustworthy, independent, and open-source AI ecosystem. We’re o

Mozilla Awards $585k to Nine Open Source Projects

“People use Tails to chat off-the-record, browse the web anonymously, and share sensitive documents. Many human rights defenders depend on Tails to do th

Firefox fixes save gigabytes of memory on image-heavy pages

Lots of important MemShrink stuff has happened in the last 27 days: 22 bugs were fixed , and some of them were very important indeed.

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 ...

Mozilla Welcomes the Rust Foundation

Today Mozilla is thrilled to join the Rust community in announcing the formation of the Rust Foundation. The Rust Foundation will be the home of the popula

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

Things to know about the GDPR, Mozilla and Firefox

Has your email inbox been filling up with privacy policy updates? It seems like every service, app or subscription I’ve signed up for (including more tha

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 ...

Mozilla VPN Completes Independent Security Audit by Cure53

Today, Mozilla published an independent security audit of its Mozilla VPN, which provides encryption and device-level protection of your connection and inf

Mozilla to explore healthy social media alternative

Update: Starting May 4, 2023, we’re expanding Mozilla.social to a private beta. If you’re interested, join our waitlist. In early 2023, Mozilla will st

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 ...

Mozilla takes action to protect users in Kazakhstan

Today, Mozilla and Google took action to protect the online security and privacy of individuals in Kazakhstan. Together the companies deployed technical so

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

Speeding Up the Rust Compiler

I last wrote in October about my work on speeding up the Rust compiler. With the year’s end approaching, it’s time for an update.

Why are hyperlinks blue?

The internet has ingrained itself into every aspect of our lives, but there’s one aspect of the digital world that I bet you take for granted. Did you ev