Mozilla Mac

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Firefox version 78 is the last supported Firefox version for Mac users of OS X 10.9 Mavericks, OS X 10.10 Yosemite and OS X 10.11 El Capitan. These users will be moved to the Firefox Extended Support Release (ESR) channel by an application update. This will provide security updates until the next ESR update in July 2021, after which the affected users will no longer receive security updates.

While Apple does not have a public policy governing security updates for older OS X releases, their ongoing practice has been to support the most recent three releases. The last security update applicable to OS X 10.11 was made available in July 2018. Unsupported operating systems do not receive security updates, have known exploits and can be dangerous to use, which makes it difficult to maintain Firefox on those versions.

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Up until July 2021, we will be updating affected users with critical security updates through the Firefox ESR channel to help retain the best possible security. After this, no security updates will be provided.

If you are using a Mac with the M1 chip, Mozilla says you will need to fully exit and restart Firefox after upgrading to version 84 in order for the browser to run natively on Apple Silicon. Mozilla Firefox for Mac is a versatile and feature-packed browser with advanced security features that can hide shared user activity and has customizable privacy settings that protect your system from unwanted tracking and harmful software. Mozilla Firefox is perfect for casual searches as well as more complex queries.

If you want to keep your Firefox version up to date, you will need to upgrade your operating system to macOS 10.12 or higher. Older versions that are not supported by Apple are unreliable and unsafe to use, which also makes it difficult to maintain Firefox on those versions.

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