Parity Signer Companion
Injects your Polkadot accounts from Parity Signer and allows signing transactions
What is Parity Signer Companion?
Parity Signer Companion is a Firefox add-on that enables users to inject and sign transactions using their Polkadot accounts stored in Parity Signer, a secure key storage solution. It works seamlessly with the Signer but requires its presence to operate. For key creation and storage without any device, consider using the Polkadot{.js} extension.
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Summary
The extension helps you to sign transactions with keys you store in the Parity Signer — https://www.parity.io/technologies/signer/. To start using, you should go to the Signer and import keys.
Without the Signer the extension is useless. If you want to create and store keys without any device, look at Polkadot{.js} extension — https://github.com/polkadot-js/extension.
Safety
Risk impact
Parity Signer Companion is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install Parity Signer Companion if you trust the publisher.
Risk likelihood
Parity Signer Companion is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.