Mozilla has released Firefox 80

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Mozilla is releasing a new Firefox version to the stable branch. Firefox 80 is notable for having a new blocklist of add-ons, improved security, and the ability to set it as the default PDF viewer on Windows.

What's new in Firefox 80

Add-on blocklist

Firefox includes a special list of extensions which are blocked by default. It includes problematic extensions and malicious add-ons that may affect your Firefox browsing in a bad way.

The updated blocklist in Firefox 80 requires less time to load and parse. Mozilla has documented it here.

Security improvements

It is now possible to disable or enable the security warning when some information is submitted  from an insecure page (HTTP) to a secure context. The browser includes an about:config option for that, named security.warn_submit_secure_to_insecure.


  • Animations are reduced for users with reduced motion settings.
  • The number of Alt-Tab previews was increased from 6 to 7.

PDF Reader

The built-in PDF reader in Firefox can now be registered as your default PDF viewer in Windows. It is now possible to make the browser handling PDF files. It is worth mentioning that I have such option starting in Firefox 77.

Download Firefox

To get the browser, visit the following link:

Download Firefox

You will see a number of folders. Click on one of the following folders:

  • win32 - Firefox 32-bit for Windows
  • win64 - Firefox 64-bit for Windows
  • linux-i686 - Firefox for 32-bit Linux
  • linux-x86_64 - Firefox for 64-bit Linux
  • mac - Firefox for macOS

Each folder has subfolders organized by the browser's language. Click on the desired language and download the installer.

Thanks to Ghacks and Milan.

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Author: Sergey Tkachenko

Sergey Tkachenko is a software developer who started Winaero back in 2011. On this blog, Sergey is writing about everything connected to Microsoft, Windows and popular software. Follow him on Telegram, Twitter, and YouTube.

3 thoughts on “Mozilla has released Firefox 80”

  1. Testing Firefox 80 on Arch Linux. I usually run ESR on Firefox. Curious about the hardware acceleration that is new to Firefox 80 on Linux. Works on my computer. Intel Graphics.

    To turn it on:

    about:config and search vaapi and true.

    Firefox received an update today as well. 80.0.1.

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