Firefox 78.0 is the latest stable version of the Firefox web browser. It was first offered on June 30, 2020 and is the second major release of the browser in June 2020.
The new version is offered via in-browser upgrades and as a direct download from the Mozilla website.
Firefox 78 is the first release of the new Firefox ESR, Extended Support Release, version and as such, introduces major changes to systems that are upgraded from previous 68.x ESR versions.
All Firefox channels are updated around the same time. Firefox Beta and Developer will get bumped to version 79.0, Firefox Nightly to version 80.0, and Firefox ESR to version 78.0 just like Firefox Stable. The Android version of Firefox will also be upgraded to 78.0 as it follows the ESR release schedule until the migration to the new Android browser completes.
The next stable version of the Firefox web browser will be released on July 28, 2020.
The rollout of the new Firefox versions starts on June 30, 2020. Firefox installations will pick up the new version automatically if automatic updating has not been disabled in the browser.
Firefox users may select Menu > Help > About Firefox to run a manual check for updates. Note that the release may not be offered right away as it may not be released yet if you try to upgrade to early on June 30, 2020.
The following pages list direct downloads for supported Firefox channels (will be available later on June 30, 2020)
TLS 1.0 and 1.1 changes, and DHE cipher suites
Mozilla's initial plan was to drop support for the outdated security protocols TLS 1.0 and 1.1 in Firefox 74.0. The organization re-enabled the protocols because of the Coronavirus pandemic and Google, and has now disabled the protocols again in Firefox 78.0.
All major browser makes pledged to remove support for the protocols from their browsers to push the adoption of TLS 1.2 and TLS 1.3 which offer better security and performance.
The protocols have not been removed in Firefox 78.0. It is still possible to restore these by doing the following:
Note that Mozilla will remove support for TLS 1.0 and 1.1 eventually so that it will no longer be possible to restore support.
Tip: use the add-on IndicateTLS to show the TLS version of sites in Firefox's address bar.
Firefox 79.0 removes support for the following DEH cipher suites as well. These are considered weak according to Mozilla:
To mitigate compatibility issues, Mozilla enabled two AES-GCM SHA2-based ciphersuites.
New major Firefox ESR version
Firefox ESR 78.0 is the new major Extended Support Release version. The ESR version bumps introduces lots of new features to the ESR channel as these get security and bug fix updates only for the most part during minor version upgrades
You can check out our reviews of the last eight or so Firefox Stable releases for a rundown on the changes, or check out some of the highlights here:
Check out this Firefox 78.0 ESR guide on the Mozilla website for additional changes.
Mozilla lists "various stability and security fixes" without providing details.
Security updates are revealed after the official release of the web browser. You find the information published here.
Additional information / sources
Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.