9to5Linux Weekly Roundup for December 14th, 2025, brings news about Firefox 146, Cinnamon 6.6, pearOS, KDE Gear 25.12, KDE Plasma 6.5.4, KDE Frameworks 6.21, COSMIC on Pop!_OS 24.04 LTS, Thunderbird 146, Tails 7.3.1, AerynOS 2025.12, Parrot 7.0 Beta, Raspberry Pi Imager 2.0.2, NVIDIA 580.119.02, Kali Linux 2025.4, Grml 2025.12, Linux 6.19 RC, Mixxx 2.5.4, and more.

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Mixxx 2.5.4 open-source virtual DJ software for performing live mixes is now available for download with various improvements and bug fixes. Here’s what’s new!

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Linus Torvalds announced the general availability of the first Release Candidate version of the upcoming Linux 6.19 kernel series for public testing. Here’s what to expect!

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