The Firefox 83.0 Stable and Firefox ESR 78.5 release date is November 17, 2020. The new stable version of the Firefox browser and the new Extended Support Release version is provided via in-browser updates and as a standalone download from the official Mozilla website.
Firefox development channels are upgraded to a new version as well; this means that Firefox Beta and Firefox Developer editions are moved to version 84.0 and Firefox Nightly to version 85.0. Firefox for Android will be upgraded to version 83.0.
You can check out the Firefox 82.0 release notes here in case you missed them.
Firefox 83.0 Stable and Firefox 78.5 ESR are released on November 17, 2020. The new version is downloaded and installed automatically provided that the automatic updating functionality of the browser has not been disabled.
Please note that we publish the release information prior to the official release. You may see a slight delay before the browser is offered via the browser's in-place upgrade functionality or on Mozilla's website.
You can check the currently installed version by selecting Menu > Help > About Firefox. The very same page runs a check for updates when it is opened to download and install updates if any are available.
Manual downloads are also available. The following pages list direct downloads for supported Firefox channels (will be available later on November 17, 2020)
Performance Improvements, less memory usage
Work on Firefox's performance and memory usage continued, and as a result, Mozilla notes that Firefox 83.0 page load performance has improved by up to 15%, page responsiveness by up to 12%, and memory usage has been reduced by up to 8%.
New HTTPS-Only Mode
Firefox 83.0 includes an option to accept only HTTPS connections when the new HTTPS-Only Mode is enabled. The browser attempts to upgrade any non-HTTPS connection in the process, and displays a warning screen if the site cannot be loaded at all. Firefox users may then continue to the HTTP site anyway or cancel the operation.
The feature is disabled by default. Firefox users who would like to start using it, can do that in the following way:
The mode offers two advantages: first, that it warns users if a site is still using HTTP, and second, that it attempts to upgrade connections automatically. The latter is helpful if a site supports HTTP and HTTPS connections and does not redirect HTTP to HTTPS automatically.
Search feature changes
Firefox's built-in search functionality has seen a number of changes and improvements in this release:
Security updates are revealed after the official release of the web browser. You find the information published here after release.
Additional information / sources
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