KSeF Signer extension
Security at a glance
Low riskSafety score 100/1000 findings
Automated estimate from our latest scan (malware, permissions, obfuscation) — not a security audit. Higher safety score is better.
See the full security reportFirefox listing ID: ksef-signer
Permissions (2)
- Communicate with desktop apps
- Access to all websites
Related extensions
Frequently asked questions
Is KSeF Signer safe to use?
Our latest automated scan rates the Firefox listing of KSeF Signer at 100/100 (low risk) — malware, permission and obfuscation checks combined. The full report lists every finding behind the number.
What permissions does KSeF Signer require?
KSeF Signer requests 2 permissions. The most significant: Communicate with desktop apps, Access to all websites. See the full breakdown in the security report.
Who develops KSeF Signer?
KSeF Signer is published by sosoba. Impersonators copy popular extension names, so always verify the developer line and listing id on the store page before installing.