Firefox 89.0.0 available with Proton GUI and 78.11.0 ESR

Mozilla[German]Mozilla's developers have released the version 89.0.0 with the new Proton user interface and the and 78.11.0 ESR of the Firefox browser on June 1, 2021. It is a new development branch, which should eliminate vulnerabilities, but also fix bugs.


The Proton GUI

In development branch 89, the Mozilla developers have released the fundamentally revised Proton user interface. The following figure shows the new browser. The release notes contain a summary of the new feature.

 Proton-Oberfläche im Firefox 89

Firefox 89.0.0

According to the release notes, version 89.0.0 brings some bug fixes and security fixes. Here's a rough overview of what's new:

  • Colors in Firefox on macOS will no longer be saturated on wide gamut displays, untagged images are properly treated as sRGB, and colors in images tagged as sRGB will now match CSS colors.


  • In full screen mode on macOS, moving your mouse to the top of the screen will no longer hide your tabs behind the system menu bar.

  • Also in full screen mode on macOS, it is now possible to hide the browser toolbars for a fully immersive full screen experience. This brings macOS in line with Windows and Linux.

There are also various stability and security fixes.

Firefox 78.11.0 esr

An update of Firefox 78.11.0 esr with one year of long-term support with the same fixed vulnerabilities has also been provided. The new Firefox and the ESR variant can be downloaded from this web page (the variant is to be selected via the displayed list boxes).

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One Response to Firefox 89.0.0 available with Proton GUI and 78.11.0 ESR

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