Sigma9
Extension Changelog
Browser extension release history.
0.8.0 — 2026-07-14
- New mainnet networks: Ethereum, Unichain, Optimism, and Polygon — joining the existing Arbitrum, Base, and Solana.
- USDC is now gasless across all seven networks, with gasless CCTP v2 bridging between every pair.
- New dedicated Networks screen to enable or disable individual chains, with network icons.
- Security: the decrypted seed is now never persisted — it is used only in memory per signature and wiped immediately after.
- Security: double-spend guard that verifies on-chain state before resending any transaction.
- Security: anti-address-poisoning and anti-clipboard-clipper hardening on send and bridge.
- Security: exact-pinned crypto-critical dependencies.
- Configurable RPC and relayer nodes, with opt-in failover (off by default).
- Confirm screen now shows source-chain and before → after balances.
- Numerous bridge and send balance-guard and error-handling fixes.
0.6.0 — 2026-07-10
- First public release on the Chrome Web Store.
- Gasless USDC send, receive, and cross-chain bridging.
Sigma9 — gasless USDC only. Keys stay on your device.