Browsers

Mozilla’s CEO discusses testimony in U.S. v. Google search case
Today, Mozilla Chief Financial Officer, Eric Muhlheim, testified in the U.S. v. Google LLC search trial, highlighting the potential impacts this case could have on small and independent browsers, and the overall ecosystem.  There are a few key themes ...
2025-05-02 16:50
Easier layout with margin-trim
If you write a lot of CSS, you are familiar with those moments when you aren’t quite sure how to accomplish what you want to accomplish.
2025-05-01 14:00
Release Notes for Safari Technology Preview 218
Safari Technology Preview Release 218 is now available for download for macOS Sequoia and macOS Sonoma.
2025-04-30 22:07
An NYC culture reporter on YouTube’s influence and the tab that got away
Here at Mozilla, we are the first to admit the internet isn’t perfect, but we know the internet is pretty darn magical. The internet opens up doors and opportunities, allows for human connection, and lets everyone find where they belong — their cor...
2025-04-30 15:00
Tackle tab overload with Firefox Tab Groups
Open a web browser and you step into a garden of forking paths — where news, messages, memes, work, learning and cat videos all compete for your attention. Every click sprouts another tab. Before you know it, your author has opened 68,000 tabs in one...
2025-04-29 18:59
You asked, we built it: Firefox tab groups are here 
What happens when 4,500 people ask for the same feature? At Firefox, we build it. Tab groups have long been the most requested idea on Mozilla Connect – our community platform – and thanks to thousands of votes, comments and passionate feedback, it...
2025-04-29 15:01
Mozilla, Eleuther AI launch toolkits to help AI builders create open datasets
Easy-to-follow guides on how to transcribe audio files into text using privacy friendly tools and how to convert different documents into a singular format. The majority of popular AI models rely on data crawled from the web, frequently without the exp...
2025-04-25 16:59
Mozilla, EleutherAI launch toolkits to help AI builders create open datasets
Easy-to-follow guides on how to transcribe audio files into text using privacy friendly tools and how to convert different documents into a singular format. The majority of popular AI models rely on data crawled from the web, frequently without the exp...
2025-04-25 16:59
Polishing your typography with line height units
Learn how to use line-height units when setting paragraph margins — creating vertical rhythm in your text.
2025-04-24 18:45
Ads performance, re-imagined. Now in beta: Anonym Private Audiences.
Together, Mozilla and Anonym are proving that effective advertising doesn’t have to come at the cost of user privacy. It’s possible to deliver both — and we’re building the tools to show the industry how. Today, we’re unveiling Anonym Private...
2025-04-23 15:00
Exploring on-device AI link previews in Firefox
Ever opened a bunch of tabs only to realize none of them have what you need? Or felt like you’re missing something valuable in a maze of hyperlinks? In Firefox Labs 138, we introduced an optional experimental feature to enhance your browsing experien...
2025-04-22 18:32
Mozilla’s CEO weighs in on U.S. v. Google
The CEO of Mozilla, Laura Chambers, provided insights about the U.S. v. Google LLC case ahead of the trial slated to begin April 21, 2025. “As the CEO of Mozilla, I often have conversations about the future of this company. Most times these conversat...
2025-04-17 12:10
Release Notes for Safari Technology Preview 217
Safari Technology Preview Release 217 is now available for download for macOS Sequoia and macOS Sonoma.
2025-04-16 21:33
The CSS shape() function
Shapes are an important aspect of graphic design.
2025-04-15 17:01
Inside the newsletter making layoffs feel less bleak and more like a group chat
Here at Mozilla, we are the first to admit the internet isn’t perfect, but we know the internet is pretty darn magical. The internet opens up doors and opportunities, allows for human connection, and lets everyone find where they belong — their cor...
2025-04-11 15:54
How UEFA and Mozilla’s Anonym nailed TikTok campaigns without compromising user data
When UEFA’s Men’s Club Competitions Online Store (operated by Event Merchandising Ltd) set out to run a TikTok campaign during the 2024 finals, the goal was clear: engage passionate club fans (ultras) and drive sales of official gear — without co...
2025-04-09 22:20
How UEFA and Mozilla’s Anonym nailed TikTok campaigns without compromising user data
When UEFA’s Men’s Club Competitions Online Store (operated by Event Merchandising Ltd) set out to run a TikTok campaign during the 2024 finals, the goal was clear: engage passionate club fans and drive sales of official gear — without compromisin...
2025-04-09 22:20
Data ethics in action: Zenjob, TikTok and Mozilla’s Anonym show a better way to measure
Let’s face it — measuring ad performance is challenging in a shifting privacy landscape. With tightening regulations and data sharing under a well-deserved microscope, advertisers are under more pressure than ever to prove their campaigns can work ...
2025-04-09 22:20
Data ethics in action: Zenjob, TikTok and Mozilla’s Anonym show a better way to measure
Let’s face it — measuring ad performance is challenging in a shifting privacy landscape. With tightening regulations and data sharing under a well-deserved microscope, advertisers are under more pressure than ever to prove their campaigns can work ...
2025-04-09 22:20
Better typography with text-wrap pretty
Support for text-wrap: pretty just shipped in Safari Technology Preview, bringing an unprecedented level of polish to typography on the web.
2025-04-08 14:00