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 Malyz ... | Continue reading


@blog.mozilla.org | 2 years ago

Why 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 | Continue reading


@blog.mozilla.org | 2 years ago

Privacy analysis of SWAN.community and United ID 2.0

Earlier this summer, we started a series of blog posts analyzing the technical merits of the various privacy-preserving advertising proposals out there. Ou | Continue reading


@blog.mozilla.org | 2 years ago

Stopping FTP support in Firefox 90

  The File Transfer Protocol (FTP) has long been a convenient file exchange mechanism between computers on a network. While this standard protocol has been supported in all major browsers ... | Continue reading


@blog.mozilla.org | 2 years ago

Firefox 90 introduces SmartBlock 2.0 for Private Browsing

Today, with the launch of Firefox 90, we are excited to announce a new version of SmartBlock, our advanced tracker blocking mechanism built into Firefox Private Browsing and Strict Mode. ... | Continue reading


@blog.mozilla.org | 2 years ago

Pocket – Break Free from the Doomscroll

Last year a new phrase crept into the zeitgeist: doomscrolling, the tendency to get stuck in a bad news content cycle even when consuming it makes us feel | Continue reading


@blog.mozilla.org | 2 years ago

Firefox 90 Supports Fetch Metadata Request Headers (SEC-Fetch-*)

  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 ... | Continue reading


@blog.mozilla.org | 2 years ago

Mozilla Publishes Policy Recommendations for EU Digital Markets Act

We've just published our recommendations for how EU lawmakers should amend the draft Digital Markets Act. | Continue reading


@blog.mozilla.org | 2 years ago

Mozilla rolls out DoH to Canadian users of Firefox

CIRA Joins Firefox’s Trusted Recursive Resolver Program In a few weeks, Firefox will start the by-default rollout of DNS over HTTPS (or DoH for short) to | Continue reading


@blog.mozilla.org | 2 years ago

Rally, a novel privacy-first data sharing platform

Mozilla teams up with Princeton University researchers to enable crowdsourced science for public good; collaborates with research groups at Princeton, Stan | Continue reading


@blog.mozilla.org | 2 years ago

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 | Continue reading


@blog.mozilla.org | 2 years ago

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 | Continue reading


@blog.mozilla.org | 2 years ago

Enhancing Privacy and Security in the DNS

In 2018, we started pioneering work on securing one of the oldest parts of the Internet, one that had till then remained largely untouched by efforts to make the web ... | Continue reading


@blog.mozilla.org | 2 years ago

Modern, clean new Firefox clears the way to all you need online

We set out in 2021 to reimagine Firefox’s design to be fast, modern and inviting the first time you run it and every day after. We’ve always had your b | Continue reading


@blog.mozilla.org | 2 years ago

A fresh new Firefox is here

In today’s major release, Firefox sports a fresh new design that gets you where you’re going online, fast and distraction-free. And since we’re all a | Continue reading


@blog.mozilla.org | 2 years ago

Firefox 89 Upgrades Private Browsing Windows with Total Cookie Protection

Today, with the launch of Firefox 89, we are happy to announce that Firefox Private Browsing windows now include Total Cookie Protection by default. | Continue reading


@blog.mozilla.org | 2 years ago

The Future of Ads and Privacy

The modern web is funded by advertisements. Advertisements pay for all those “free” services you love, as well as many of the products you use on a dai | Continue reading


@blog.mozilla.org | 2 years ago

Manifest v3 Update

Two years ago, Google proposed Manifest v3, a number of foundational changes to the Chrome extension framework. Many of these changes introduce new incompatibilities between ... | Continue reading


@blog.mozilla.org | 2 years ago

Behind the design of the fresh new Firefox coming June 1

A fresh new Firefox is coming your way on June 1. Worry less, get more done and feel good about what’s on the horizon. That’s the energy we all need in 2021. | Continue reading


@blog.mozilla.org | 2 years ago

Site Isolation in Firefox

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


@blog.mozilla.org | 2 years ago

Beware of Applications Misusing Root Stores

We have been alerted about applications that use the root store provided by Mozilla for purposes other than what Mozilla’s root store is curated for. We provide a root store ... | Continue reading


@blog.mozilla.org | 2 years ago

Mozilla Rally

We wrote recently about how difficult it is to understand the data companies collect from you, and what they’re doing with it. These companies determine how your data is used ... | Continue reading


@blog.mozilla.org | 3 years ago

Understanding Private Browsing (2010)

Private Browsing was introduced in Firefox 3.5, giving users the option of browsing the web without keeping track of their history.  A recent Test Pilot ... | Continue reading


@blog.mozilla.org | 3 years ago

Firefox 88 combats window.name privacy abuses

We are pleased to announce that Firefox 88 is introducing a new protection against privacy leaks on the web. Under new limitations imposed by Firefox, trackers are no longer able ... | Continue reading


@blog.mozilla.org | 3 years ago

Notes on Implementing Vaccine Passports

Now that we're starting to get widespread COVID vaccination vaccine passports have started to become more relevant. The idea behind a vaccine passport is that you would have some kind ... | Continue reading


@blog.mozilla.org | 3 years ago

Built-in FTP implementation to be removed in Firefox 90

Last year, the Firefox platform development team announced plans to remove the built-in FTP implementation from the browser. FTP is a protocol for transferring files ... | Continue reading


@blog.mozilla.org | 3 years ago

Latest Mozilla VPN features keep your data safe

Today, we’re launching two new features to give you an added layer of protection with our trusted Mozilla VPN service. Mozilla has a reputation for building products that help you keep your information safe. | Continue reading


@blog.mozilla.org | 3 years ago

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 ... | Continue reading


@blog.mozilla.org | 3 years ago

Firefox 87 trims HTTP Referrers by default to protect user privacy

  We are pleased to announce that Firefox 87 will introduce a stricter, more privacy-preserving default Referrer Policy. From now on, by default, Firefox will trim path and query string ... | Continue reading


@blog.mozilla.org | 3 years ago

Reinstating Net Neutrality in the US

Today, Mozilla together with other internet companies ADT, Dropbox, Eventbrite, Reddit, Vimeo, Wikimedia, sent a letter to the FCC asking the agency to reinstate net neutrality as a matter of ... | Continue reading


@blog.mozilla.org | 3 years ago

Insights into HTTPS-Only Mode

  In a recent academic publication titled HTTPS-Only: Upgrading all connections to https in Web Browsers (to appear at MadWeb - Measurements, Attacks, and Defenses for the Web) we present ... | Continue reading


@blog.mozilla.org | 3 years ago

Firefox B tch to Boss extension

The Firefox B!tch to Boss extension replaces words like “bitch”, often used in derogatory comments directed at women, with the word “boss.” | Continue reading


@blog.mozilla.org | 3 years ago

India’s new intermediary liability and digital media laws will harm the internet

In in a sudden move that will have disastrous consequences for the open internet, the Indian government has notified a new regime for intermediary liability protections. | Continue reading


@blog.mozilla.org | 3 years ago

Notes on Addressing Supply Chain Vulnerabilities

Addressing Supply Chain Vulnerabilities One of the unsung achievements of modern software development is the degree to which it has become componentized: not that long ago, when you wanted to ... | Continue reading


@blog.mozilla.org | 3 years ago

Jessica Rosenworcel’s FCC appointment is good for the internet

Jessica Rosenworcel's appointment as acting FCC chair is good for the internet. Here's why we're hopeful for a better internet. | Continue reading


@blog.mozilla.org | 3 years ago

Think you don’t need a VPN? Here are times you might need a VPN

Here are a few times a trustworthy VPN will come in handy that you might not have considered. Close the gap in your online security with Mozilla VPN. | Continue reading


@blog.mozilla.org | 3 years ago

Remain Calm: The fox is still in the Firefox logo

How memes and misinformation spread like wild fire(fox). | Continue reading


@blog.mozilla.org | 3 years ago

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

Today we're sharing two new features: multiple picture-in-picture (multi-PiP) and our latest privacy protection combo, the dynamic duo of Total Cookie Protection and Supercookie Protections (launched in last month’s release) are here to combat cross-site cookie tracking once and … | Continue reading


@blog.mozilla.org | 3 years ago

Firefox 86 Introduces Total Cookie Protection

Total Cookie Protection is a major anti-tracking advance in Firefox that confines cookies to the site where they were created. | Continue reading


@blog.mozilla.org | 3 years ago

Mozilla Welcomes the Rust Foundation

We join the Rust community in announcing the formation of the Rust Foundation, the host of the popular Rust programming language that began within Mozilla. | Continue reading


@blog.mozilla.org | 3 years ago

Effectively Fuzzing the IPC Layer in Firefox

  The Inter-Process Communication (IPC) Layer within Firefox provides a cornerstone in Firefox’ multi-process Security Architecture. Thus, eliminating security vulnerabilities within the IPC Layer remains critical. Within this blogpost we ... | Continue reading


@blog.mozilla.org | 3 years ago

Firefox 85 Cracks Down on Supercookies

Trackers and adtech companies have long abused browser features to follow people around the web. Since 2018, we have been dedicated to reducing the number of ways our users can ... | Continue reading


@blog.mozilla.org | 3 years ago

Mozilla's Climate Commitments

Based on Mozilla's greenhouse gas emissions assessment, we are now pledging carbon-neutrality as well as significant reductions in our organisation emissions going forward. | Continue reading


@blog.mozilla.org | 3 years ago

Firefox: Paying Mozilla to promote your extension has failed

A few months ago, we launched a pilot for a new program to help developers promote their extensions on addons.mozilla.org (AMO). The main goal of ... | Continue reading


@blog.mozilla.org | 3 years ago

Leaking silhouettes of cross-origin images using a timing side channel

This blog post is one of several guest blog posts, where we invite participants of our bug bounty program to write about bugs they've reported to us. This is a ... | Continue reading


@blog.mozilla.org | 3 years ago

Now for the fun part of Mozilla’s logo design (2016)

Learn more about how Mozilla works to design its logo. Find out about several paths forward, our seven logo design options, and tell us what you think! | Continue reading


@blog.mozilla.org | 3 years ago

Our Year in Review: How we’ve kept Firefox working for you in 2020

We look back at this unprecedented year and present you with our list of top Firefox features that made 2020 a little easier.  | Continue reading


@blog.mozilla.org | 3 years ago

State of Mozilla 2019-2020: Annual Impact Report

Every year in the spirit of openness upon which Mozilla was founded, we share publicly the State of Mozilla, our annual report that outlines how our organization is meeting the challenges of online life. | Continue reading


@blog.mozilla.org | 3 years ago