If you use Firefox and have had issues connecting to some Google-owned properties and services, then you may have experienced an issue that Mozilla fixed in Firefox 143.0.4.
The fourth point update for Firefox 143 addresses a single issue. While it is not uncommon for Mozilla to release point updates — smaller updates that fix pressing matters or security issues — it is rarer to see a single issue release.
It has been less than a week that Mozilla released Firefox 143.0.3 to address bugs and security issues in the browser.
Mozilla notes that the release improves “Firefox’ connection fallback behavior to mitigate sporadic slow/failed loads on some Google sites”. The issue affected devices with Firefox with certain third-party software installed.
The release notes do not provide any details, but the bug report over at Bugzilla does.
According to it, users started to note the behavior on Google Drive. Tests with other browsers confirmed that the issue was Firefox-specific. The investigation revealed that HTTP/3 connections were blocked, which forced Firefox to fallback to HTTP/2, but a bug caused these connections to fail to be created.
The update fixes the issue. Firefox users who use the browser to connect to Google services and noticed issues connecting to them should install it right away to fix the issue. Everyone else shouldn’t feel any hurry to install it.
The new version is available already. You can force the installation by selecting Menu > Help > About Firefox in the main menu. This should trigger the download and upgrade.
The next major Firefox release is scheduled for October 14, 2025. It is the same day that Microsoft is ending support for Windows 10 on officially.