Mozilla is releasing the biggest update to the Firefox browser in years. Firefox 57 officially launches on November 14th, 2017 but beta versions have been available for a few months, and the stable release is already on Mozilla’s servers if you’re impatient.

The browser is getting a new user interface, but more importantly it has a bunch of new tools that Mozilla calls Quantum which make better use of multi-core processors to speed up the browser while also improving stability.

In fact, the changes are so big that Mozilla is calling the latest release Firefox 57 Quantum.

The company has been slow to fully adopt multi-process architecture. It’s something Google Chrome has had from day one, which is why Chrome has long been a faster web browser… although Chrome can also be a bit of a memory hog because of the way it assigns each browser tab its own process.

Mozilla added initial multi-process support to Firefox with the Electrolysis project that started rolling out last year. Quantum is the next step. Mozilla’s Lin Clark has a good overview of the changes in Firefox 57, but here are a few highlights:

  • A graphics driver crash won’t bring down the whole browser anymore.
  • The Stylo CSS engine speeds up CSS loading by splitting the work between CPU cores.
  • While more work is being split between different CPU cores, the main process still does a lot, and a new Quantum DOM helps prioritize tasks that are most likely to need doing first.

The result is that the web browser loads more quickly, renders content more quickly, and shouldn’t crash as often. Mozilla says the browser is twice as fast as it was a year ago, while using 30 percent less memory than Google Chrome.

In the future Mozilla is hoping to improve parallel processing so that multiple CPU cores can load different content on the same page, speeding things up even further. And a new Quantum Render project is coming next year. It will be able to speed things even further by leveraging modern GPUs.

Oh, and Firefox 57 is also the first version of the browser to use the new Photon user interface that includes square tabs, a new menu design, and a combined search bar and URL bar (although you can also separate them if you prefer the old school look).

Photon is also designed to work better on displays with high pixel densities and/or computers with touchscreen displays.

On the down side, many older browser extensions no longer work with Firefox 57. Mozilla has been transitioning its plugin architecture for the past few years, but Firefox 57 is pretty much the end of the line for all legacy plugins that haven’t been converted to WebExtensions.

If you rely on extensions that use the old architecture, your best option may be to migrate them to another Firefox-compatible browser such as Pale Moon or Waterfox.

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6 replies on “Firefox 57 Quantum is faster, more stable, and built for modern hardware”

  1. I was hoping for smooth zooming in/out with this release. Too bad it didn’t happen. Although, I did lose the use of some extensions or they’re gimped in features now.

  2. And so Firefox dies with this release, Qunatum kills almost all the most useful extensions and reasons for using Firefox.

    Now Firefox is nothing more than a Google Chrome clone and Firefox cannot compete with Chrome so what is the point of dropping the reason for still using Firefox.

    Also I hate the Chrome UI, I happen to still like when browsers actually had menus and text labels, all that is gone know thanks to Firefox 57.

    Alternatives like Vivaldi, Waterfox or Palemoon are worth checking out.

  3. FF 57 also has a notable downside sometimes glossed-over by Mozilla: thousands of useful browser extensions will be tossed on the scrap heap as Firefox switches off “legacy” extension support. All extensions now must be written using Chrome’s less-capable WebExtensions model. For me, the loss of tab organizing extensions like “Tab Groups” takes away an incentive to put up with FF’s memory leaks and other shortcomings. Might as well just switch to Chrome for everything now.

  4. This release will kill the majority of your extensions, and there most likely will never be replacements for them. Switch to Waterfox if you want to keep using them.

  5. Is this the main version or just the last beta version befor the main version?

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