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🔥 Firefox 80.0 OUT NOW! The highlight of this release is that it enables Mozilla's new add-ons blocklist designed to enhance the browser's performance and scalability by lowering the time needed to parse the list when automatically disabling problematic Firefox extensions. Firefox 80 also enables users to set it as their system's default system PDF viewer and fixes several crashes that make the web browser more stable for screen reader users.

With the release of Firefox 80, all other Firefox development branches have also moved up a version bringing Firefox Beta to version 81 and the Nightly builds to version 82. Mozilla has been blocking extensions causing stability or security issues with the help of a list of unsafe add-ons since at least 2008. Starting with Firefox 80, the web browser will use a new and more scalable version of this blocklist which should lower the time Firefox needs to parse it.

Security fixes:

• CVE-2020-15663: Downgrade attack on the Mozilla Maintenance Service could have resulted in escalation of privilege

• CVE-2020-15664: Attacker-induced prompt for extension installation

• CVE-2020-12401: Timing-attack on ECDSA signature generation

• CVE-2020-6829: P-384 and P-521 vulnerable to an electro-magnetic side channel attack on signature generation

• CVE-2020-12400: P-384 and P-521 vulnerable to a side channel attack on modular inversion

• CVE-2020-15665: Address bar not reset when choosing to stay on a page after the beforeunload dialog is shown

• CVE-2020-15666: MediaError message property leaks cross-origin response status

• CVE-2020-15667: Heap overflow when processing an update file

• CVE-2020-15668: Data Race when reading certificate information

• CVE-2020-15670: Memory safety bugs fixed in Firefox 80 and Firefox ESR 78.2


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