Mozilla Blog

Mozilla Awards Over Half a Million to Open Source Projects

At Mozilla we were born out of, and remain a part of, the open source and free software movement. Through the Mozilla Open Source Support (MOSS) program, w

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 […]

Deprecating Non-Secure HTTP

Today we are announcing our intent to phase out non-secure HTTP. There's pretty broad agreement that HTTPS is the way forward for the web. In recent months, there have been ...

Critical Security Issue Identified in iTerm2

A security audit funded by Mozilla has discovered a critical security vulnerability in the widely used macOS terminal emulator iTerm2.

Mozilla Is Hiring a Developer to Work on Thunderbird Full-Time

The Thunderbird Project is hiring for a software engineer! We’re looking for an amazing developer to come on board to help make Thunderbird the best Email client on the planet! If you are interested you can apply via the link below, following the job description. Here’s the job description: Title: Thunderbird Software…

Mozilla's new Firefox Linux package for Ubuntu and Debian derivatives

Great news for Linux users, after months of testing, Mozilla released today a new package for Firefox on Linux (specifically on Ubuntu, Debian, and any Deb

Introducing a terms of use and updated privacy notice for Firefox

UPDATE: We’ve seen a little confusion about the language regarding licenses, so we want to clear that up. We need a license to allow us to make some of t

Encrypted SNI Comes to Firefox Nightly

TL;DR: Firefox Nightly now supports encrypting the TLS Server Name Indication (SNI) extension, which helps prevent attackers on your network from learning your browsing history. You can enable encrypted SNI ...

Mozilla and Unity Bring Unity Game Engine to WebGL

The Rust compiler is still getting faster

A key theme of the Rust 2019 roadmap is maturity . This covers a variety of topics, but a crucial one is compile times. For example, the roadmap itself has the following as the first main theme for the compiler team.

Firefox expands fingerprint protections

With Firefox 145, we’re rolling out major privacy upgrades that take on browser fingerprinting — a pervasive and hidden tracking technique that lets we

Mozilla Recognized as Most Trusted Internet Company for Privacy

I’m very happy to share that Mozilla has been named the Most Trusted Internet Company for Privacy in 2012, according to a study performed by the Ponemon

How to speed up the Rust compiler one last time

Due to recent changes at Mozilla my time working on the Rust compiler is drawing to a close. I am still at Mozilla, but I will be focusing on Firefox work for the foreseeable future.

An Invisible Tax on the Web: Video Codecs (2018)

Here’s a surprising fact: It costs money to watch video online, even on free sites like YouTube. That’s because about 4 in 5 videos on the web today re

Mozilla Gains Global Support For a Firefox Mobile OS

First devices featuring Firefox OS to be manufactured by TCL Communication Technology (Alcatel) and ZTE Leading global network operators back initiative, i

Firefox Release Includes Total Cookie Protection and Multiple Picture-in-Picture

Beginning last year, the internet began playing a bigger role in our lives than ever before. In the US, we went from only three percent of workers to more

Mozilla Advances JPEG Encoding with Mozjpeg 2.0

We’re pleased to announce the release of mozjpeg 2.0. Early this year, we explained that we started this project to provide a production-quality JPEG encoder that improves compression while maintaining ...

Distrust of Symantec TLS Certificates

A Certification Authority (CA) is an organization that browser vendors (like Mozilla) trust to issue certificates to websites. Last year, Mozilla published and discussed a set of issues with one ...

JavaScript: Servo’s only garbage collector

pre.sourceCode { margin-left: 2em; } .sourceCode > span.k, .sourceCode > span.o, .sourceCode > span.bp, .sourceCode > span.kd { font-weight: bold; } .sourceCode > span.kt, .sourceCode > span.cp { ...

Firefox Keeps Getting Faster

Web browsing is a pervasive part of modern life, and the quality of the experience directly affects the quality of your day. When your tasks are disrupted

Firefox Now Offers a More Private Browsing Experience

We’re releasing a powerful new feature in Firefox Private Browsing called Tracking Protection. We created this feature because we believe in giving you m

Firefox Reality Now Available

Earlier this year, we shared that we are building a completely new browser called Firefox Reality. The mixed reality team at Mozilla set out to build a web

Introducing Heka

We here on the Mozilla Services team are happy to announce our first beta release (v0.2b1) of Heka, a tool for high performance data gathering, ...

Thunderbird’s Future Home

Summary The investigations on Thunderbird’s future home have concluded. The Mozilla Foundation has agreed to serve as the legal and fiscal home for the Thunderbird project, but Thunderbird will migrate off Mozilla Corporation infrastructure, separating the operational aspects of the project. Background In late 2015…

Asm.js in Firefox Nightly

I’m happy to announce that OdinMonkey, an asm.js optimization module for Firefox’s JavaScript engine, is now in Nightly builds and will ship with Firefox 22 in June.

Facebook’s claims about the Ad Observer are wrong

Recently the Surgeon General of the United States weighed in on the spread of disinformation on major platforms and its effects on people and society. He e

The future of MDN: a focus on web docs

Building MDN into a world class repository of high quality Web documentation is one of the most valuable things Mozilla has done for Web developers. Now we’re looking to double-down ...

Mozilla launches new brand identity

Seven months since setting out to refresh the Mozilla brand experience, we’ve reached the summit. Thousands of emails, hundreds of meetings, dozens of concepts, and three rounds of research later, ...

Mozilla Monitor Plus: automatically remove your personal info from data brokers

Today, Mozilla Monitor (previously called Firefox Monitor), a free service that notifies you when your email has been part of a breach, announced its new p