According to @adam3us, Blockstream released Jade firmware 1.0.38 with important security updates and major camera improvements to Jade Plus, including 35% faster transaction signing and enhanced QR reliability in low light and with imperfect codes, which directly impacts BTC self-custody transaction processing speed and accuracy (source: @adam3us on X citing @BlockstreamJade, Dec 10, 2025). He urges users to upgrade promptly and stay on the latest firmware, highlighting JadeLink as the best method for fast, air-gapped updates that support reliable PSBT and QR-based cold-signing workflows for BTC (source: @adam3us on X; @BlockstreamJade firmware 1.0.38 announcement).