14 DAY TRIAL // Mozilla released today the fourth maintenance update to the latest Firefox 66.0 "Quantum" web browser series to address a major issue preventing all types of extensions from running or being installed.
On May 3rd, Mozilla was made aware of a critical bug in the latest Firefox 66.0.3 release of its popular web browser for desktops and mobile platforms, which apparently prevented new and existing add-ons, themes, search engines, and language packs from being installed or run.
Mozilla immediately took action and pushed a temporary fix via OTA (Over-the-Air) updates to all users on desktop platforms, which includes Linux, macOS, and Windows systems, for all available channels (Stable, Beta, and Nightly), urging users not to delete their installed add-ons.
Firefox ESR and Firefox for Android users where affected too, but Mozilla couldn't patch the issue without releasing a new version, which comes today as Firefox 66.0.4 and Firefox 60.6.2 ESR, repairing the broken certificate chain and re-enable add-ons that had been disable.
Some users of Firefox on certain Linux-based operating system where affected as well and couldn't receive the said patch until new versions are made available by the maintainers of their GNU/Linux distributions via the official software channels. Mozilla recommends to install Firefox 66.0.4 as soon as it's available in your repositories.
Be aware, some issues are still present
Even if Mozilla rushed to fix the critical issue with the release of Firefox 66.0.4 and Firefox 60.6.2 ESR, it would appear that many issue are still present even after installing these versions. Mozilla promises that it constantly works on fixing all related problems, so expect a new version soon.
"There are remaining issues that we are actively working to resolve, but we wanted to get this fix out before Monday to lessen the impact of disabled add-ons before the start of the week," said Mozilla in a blog post today. To see the unresolved issues and their temporary solution, check out the release notes.
Without first ado, we recommend downloading and installing Mozilla Firefox 66.0.4 for GNU/Linux, macOS, and Windows, Firefox 66.0.4 for Android, as well as Mozilla Firefox 60.6.2 ESR for GNU/Linux, macOS, and Windows. On Windows and macOS, you can install it via OTA updates, and on Android systems via Google Play store.