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Firefox Quantum Offers Huge Leap in Speed, Usability

The open-source web browser gets a major update, with turbocharged performance, a new look, and better memory usage.

 & Michael Muchmore Contributor

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Mozilla remains dedicated to creating an open-source web browser that not only benefits from a global community of volunteer coders, but leads in speed, standards support, usability, and memory savings.

Today, the nonprofit launches a major update to its web browser called Firefox Quantum, aka version 57. It's faster, cleaner looking, better with memory usage, and integrates the Pocket webpage-saving service.

"We have put a ton of hard engineering work into rebuilding the core web rendering engine," Mozilla CMO Jascha Kaykas-Wolff tells PCMag. "This is the guts that make the product fast."

The Firefox development team used the Rust programming language to build this new rendering engine, which incorporates code from the Servo project and can take advantage of parallel processing using today's multicore CPUs. The new code is also 64-bit, Kaykas-Wolff says.

A Faster Browser

To demonstrate the speedup, we ran the JetStream and Speedometer benchmarks (both available via browserbench.org) on a Surface Book with a Core i5 processor and 8GB of RAM.

On the Speedometer benchmark, the pre-Quantum Firefox release scored 45, compared with 70 for Firefox Quantum. JetStream is one of the most thorough JavaScript benchmarks around, incorporating tests from Google's Octane and the WebKit Sunspider benchmark. Firefox Quantum scored 151 on JetStream compared with 144 for Google Chrome.

Firefox Quantum Speedometer

Keep in mind that those are synthetic benchmarks that only test JavaScript and DOM manipulation. Mozilla concentrated on actual page load speed, and posted video demos of comparative page loading speed with Chrome.

RAM usage also goes on a diet with Firefox Quantum: Kaykas-Wolff says the browser uses 30 percent less memory than Chrome. Indeed, even the previous versions of Firefox tested by PCMag showed significantly lower memory usage than competing browsers.

The new Firefox is also a 64-bit application when installed on a 64-bit version of Windows, a performance and security boon. Chrome, by contrast, still defaults to 32-bit, though a 64-bit version is available on demand. And Microsoft Edge only installs as 64-bit on 64-bit machines.

The new release means it's the moment of truth for legacy add-ons, aka extensions. Quantum will no longer tolerate legacy extensions, but only those that use the new extension system. The new system will bring some real benefits, such as improved security and stability. Best of all: You'll no longer need to wait for all your extensions to be checked and updated every time Firefox updates.

Interface Redesign

The new design features, part of what Mozilla calls the Photon Design System, include lots of tweaks to the user experience. The new design sports Edge-like, squared-off tabs, and an interface tour familiarizes new users with the browser. A new Library button give you access to your history, bookmarks, Pocket list, downloads, screenshots and synced tabs. That's right, screenshots—Firefox Quantum includes built-in screenshot capability. A new start page not only shows tiles linking to your top sites, but also Pocket-recommended sites and highlights from sites you've frequented.

Firefox Quantum Tour

Pocket

Last February, Mozilla acquired Read It Later, maker of the Pocket website-saving service. But the organization thinks of Pocket as more than just a site saver. The point is "discovery and accessibility of high quality web content," according to the acquisition announcement. Mozilla now uses Pocket to suggest sites of interest on the browser's new-tab page. Of course, there's still a button, now in the address bar, that lets you save sites you want to read later, regardless of what devices you're on, since it's saved in the cloud.

Speedboat

To celebrate the launch of Firefox Quantum, Mozilla is offering ferry service for three days in New York City. The ferry runs between Greenpoint, Brooklyn and lower Manhattan, and, as Kaykas-Wolff points out, it's 10 minutes faster than comparable ferries—just like Firefox is faster.

To try it for yourself, download Firefox Quantum from Firefox.com. For more background, watch the video below. And be sure to look for an updated review of Firefox on PCMag in the coming days.

About Our Expert

Michael Muchmore

Michael Muchmore

Contributor

My Experience

I've been testing PC and mobile software for more than 20 years, focusing on photo and video editing, operating systems, and web browsers. Prior to my current role, I covered software and apps for ExtremeTech and headed up PCMag’s enterprise software team. I’ve attended trade shows for Microsoft, Google, and Apple and written about all of them and their products.

I still get a kick out of seeing what's new in video and photo editing software, and how operating systems change over time. I was privileged to byline the cover story of the last print issue of PC Magazine, the Windows 7 review, and I’ve witnessed every Microsoft misstep and win, up to the latest Windows 11.

I’m an avid bird photographer and traveler—I’ve been to 40 countries, many with great birds! Because I’m also a classical music fan and former performer, I’ve reviewed streaming services that emphasize classical music.

Technology I Use

For everyday work, I use a good-old Dell tower with 16GB of RAM, a 12th-gen Intel Core i7 processor, and an Nvidia RTX 3060 Ti GPU that runs on Windows 11. I pair it with a 4K Lenovo ThinkVision P27u-10 monitor and a Logitech MX Vertical mouse. For offsite work, I use a 2024 Microsoft Surface Laptop with a Qualcomm Snapdragon X Elite processor. Camera-wise, I moved to mirrorless from a Canon EOS 80D with a Canon 70-300mm IS USM lens. I now have a Canon EOS R7 with a 100-400mm lens, but I miss my DSLR for several reasons.

In order of usage, the software I turn to most frequently is the Edge web browser, Slack, Adobe Creative Cloud, Microsoft 365, Firefox, Brave, and WhatsApp. I use the Windows Phone link app to see everything on my Samsung Galaxy S21 Ultra phone, which has excellent telephoto capability.

For fitness monitoring, I have a Fitbit Charge 6 and use an Anker Smart Scale P1. I’m also a streaming fan, so I subscribe to both Amazon Music Unlimited (especially for its Dolby Atmos content) and Qobuz (for its high-res sound quality and classical catalog). I recently added a Vizio 5.1 Soundbar SE, which sounds surprisingly good given its low price. To holler commands instead of using a remote control, I have the Amazon Fire TV Cube in the living room, which lets me verbally tell the TV what I want to watch. It hooks up to an LG B4 OLED TV. I have a Sonos One speaker in my kitchen that also ties in with Alexa, as does the Echo Dot 2 With Clock in my bedroom. For serious listening, I have B&W 601 speakers plugged into a Conrad-Johnson Sonographe amp and preamp, with a Cambridge Audio AXN10 streamer as source. For reading, I also have a Nook GlowLight 3.

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