Tuesday, March 24, 2020

TenFourFox FPR21b1 available

TenFourFox Feature Parity Release 21 beta 1 is now available (downloads, hashes, release notes). I decided against adding the AltiVec GCM accelerator for this release, since it needs some extra TLC to convert from VSX to VMX, and I'd like to test the other major changes independently without introducing a bigger bug exposure surface than necessary. As promised, however, this release does have support for higher-speed 0RTT TLS 1.3 with HTTP/2 (particularly useful on Google properties) and has additional performance adjustments to improve parallelism of TLS connections to HTTP/1.x sites (mostly everybody else). I also updated Reader mode to the most current version used in Firefox 74, incorporating several important fixes; for a slow or complex site that you don't need all the frills for, try turning on Reader mode by clicking the "book" icon in the URL bar. You can do it even while the page is loading (reload after if not all of it comes up). FPR21 will go live with Firefox 68.7/75 on April 7.


  1. Cameron, do we need to worry about CVE-2020-6819 and CVE-2020-6820?

    1. Yes, it's vulnerable, but it would need a PowerPC-specific attack and it's coming out so close to FPR21 that I'll just roll the fixes in. It's building as I write this.

    2. Awesome! Many thanks, Cameron.


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