Mozilla Blog

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 ...

Mozilla and Unity Bring Unity Game Engine to WebGL

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

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 ...

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

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.

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 ...

Australis is landing in Firefox Nightly

Australis in Firefox on Linux, Mac, and Windows A very exciting set of changes is landing in Firefox Nightly. We’ve been calling the project Australis, but, simply, it’s the next ...

Privacy Analysis of FLoC

In a previous post, I wrote about a new set of technologies “Privacy Preserving Advertising”, which are intended to allow for advertising without compr

Extensions in Firefox 58

With the release of Firefox Quantum on November 14, 2017, we officially entered a WebExtensions-only world for add-on development. While that event was certainly the news of the day, Firefox ...

Firefox: Performance in Progress

In the last six months the Firefox performance team has implemented changes to improve startup, responsiveness, security (Fission), and web standards. Startup and perceived startup Doug Thayer and Emma Malysz ...

Firefox’s Test Pilot Program Returns

Like a cat, the Test Pilot program has had many lives. It originally started as an Add-on before we relaunched it three years ago. Then in January, we anno

The Future of Developing Firefox Add-ons

Today we are announcing some major upcoming changes to Firefox add-ons. Our add-on ecosystem has evolved through incremental, organic growth over the years, but there are some modernizations to Firefox ...

Mozilla and Partners Prepare to Launch First Firefox OS Smartphones

First Open Web Devices Powered by Firefox OS Make Smartphones More Accessible; Regional announcements coming soon Mountain View, Calif. – July 1, 2013 – Mozilla, the mission-based organization dedicated to ...

Firefox for Android will soon support extensions

During the release cycle of Firefox 120, we’ll begin to see the emergence of dozens of new, openly available extensions on Firefox for Android on addons.mozilla.org (AMO). We’re taking a ...

When a video codec wins an Emmy

It’s not every day a video codec wins an Emmy. But yesterday, the Television Academy honored the AV1 specification with a Technology & Engineering Em

Mozilla’s Manifest v3 FAQ

Developers have asked what Google's proposed changes to their extensions API, known as Manifest v3, mean for Mozilla. Here are some frequently asked questions.

Celebrating 10 Years of Firefox

10 years ago we built Firefox to give you a choice. The Web was a monoculture and the only way in was through the company that controlled your operating sy

Firefox Private Browsing vs. Chrome Incognito: Which Is Faster?

With the launch of Firefox Quantum, Mozilla decided to team up with Disconnect Inc. to compare page load times between desktop versions of Chrome’s Incog

Firefox 90 supports Fetch Metadata Request Headers

We are pleased to announce that Firefox 90 will support Fetch Metadata Request Headers which allows web applications to protect themselves and their users against various cross-origin threats like ...

ECMAScript 2016+ in Firefox

After the release of ECMAScript 2015, a.k.a. ES6, the ECMAScript Language Specification is evolving rapidly: it's getting many new features that will help developing web ...

Things about the new Firefox browser for Android

64-bit Firefox is the new default on 64-bit Windows

Users on 64-bit Windows who download Firefox can get our 64-bit version by default. That means you get a more secure version of Firefox, one that also crashes a whole lot less . How much less? In our tests so far, 64-bit Firefox reduced crashes by 39% on machines with 4GB of RAM or more.