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Firefox 77 launches WebRender on more Windows 10 laptops

Mozilla released Firefox 77 today, June 2, 2020, on the Stable desktop for Windows, macOS and Linux with bug fixes, new features and security fixes.

The most notable changes to Firefox 77 are an updated page about: certificate and the wider availability of the WebRender feature.


In addition, this version mainly contains bug fixes and performance improvements.

Desktop users with Windows, Mac and Linux can upgrade to Firefox 77 by going to Options -> Help -> About Firefox and the browser will automatically check the new information and will install it when available.

You can download Firefox 77 from the following links:

If the above links have not yet been updated for Firefox 77, you can also download them manually from the Mozilla FTP version.

WebRender continues to be released

WebRender is a 2D browser performance system that uses a user's graphics card to deliver a webpage instead of a CPU.

The use of this "camera" makes the images more visible, improves their performance web pages and creates specifically visual effects.

Mozilla has launched WebRender on Firefox 67 in a limited group of users.

With Firefox 77, WebRender is now available by default on all Windows 10 laptops using NVIDIA GPUs (3440 × 1440).

In Firefox 71, Mozilla released a new viewing page certificates which allows you to quickly see one website certificate and the authorities who trust it.

This page opens in its own tab and requires you to enter one certificate hash as an argument to see her information, as shown below.

With Firefox 77, Mozilla has updated the about: Certificate page to allow you to use it without specifying a specific certificate.

Other bug fixes, improvements and developer changes

Errors corrected:

  • The application list in Firefox Options is now accessible to users of the screen reader.
  • Some live regions in the past did not report up-to-date text with the JAWS screen reader. This issue has been resolved.
  • Date / time entries are no longer labeled accessible to user tools.

Other changes:

  • Browser.urlbar.oneOffSearches has been removed. To hide one-time search buttons, uncheck the search engines on about: preferences # search
  • Pocket recommendations are now appearing for UK users on the new Firefox tab page


  • Significant improvements in JavaScript error detection make uploading and controlling resources faster and less memorable over time. Support for the source map has become much more reliable and will work in many more cases.
  • Support has been added for the JavaScript API String.prototype.replaceAll () which allows developers to return a new string with all the matches in the provided pattern while maintaining the original string.

Security vulnerabilities have been fixed

With this release, Mozilla has fixed seven security vulnerabilities, with five of them being rated "High", one as "Moderate" and one as "Low".

The full list of security issues repaired by Mozilla in Firefox 77.0 is as follows:


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Teo Ehc
Teo Ehc
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