Is Cipher Safe?

Use Cipher with some caution. Cipher is a Firefox add-on with a Nerq Trust Score of 50.5/100 (C-), based on 3 independent data dimensions. It is below the recommended threshold of 70. Security: 90/100. Popularity: 15/100. Data sourced from addons.mozilla.org metadata, permissions analysis, and source code availability. Last updated: 2026-03-24. Machine-readable data (JSON).

Is Cipher safe?

CAUTION — Cipher has a Nerq Trust Score of 50.5/100 (C-). It has moderate trust signals but shows some areas of concern that warrant attention. Suitable for development use — review security and maintenance signals before production deployment.

Trust Score Breakdown

Security
90
Popularity
15

Key Findings

Security score: 90/100 (strong)
Popularity: 15/100 — Firefox Add-ons

Details

AuthorJavier Junquera
Categoryfirefox
SourceN/A

Cipher Across Platforms

Same developer/company in other registries:

cipher
63/100 · crates
cipher
55/100 · pypi
Cipher
52/100 · wordpress
Cipher
46/100 · nuget

Safety Guide: Cipher

What is Cipher?

Cipher is a Firefox add-on — Browser extension for encrypt/decrypt editable fields like emails, pastes, notes... Encrypt text from context menu..

How to Verify Safety

Review permissions on addons.mozilla.org. Check if source code is available.

You can also check the trust score via API: GET /v1/preflight?target=Cipher

Key Safety Concerns for Firefox add-ons

When evaluating any Firefox add-on, watch for: excessive permissions, data harvesting.

Trust Assessment

Cipher has a Nerq Trust Score of 50/100 (C-) and has not yet reached Nerq trust threshold (70+). This score is based on automated analysis of security, maintenance, community, and quality signals.

Key Takeaways

Frequently Asked Questions

Is Cipher safe?
Use with some caution. Cipher has a Nerq Trust Score of 50.5/100 (C-). Strongest signal: security (90/100). Score based on security (90/100), popularity (15/100).
What is Cipher's trust score?
Cipher: 50.5/100 (C-). Score based on: security (90/100), popularity (15/100). Scores update as new data becomes available. API: GET nerq.ai/v1/preflight?target=Cipher
What are safer alternatives to Cipher?
In the firefox category, more Firefox add-ons are being analyzed — check back soon. Cipher scores 50.5/100.
What permissions does Cipher need?
Review Cipher's requested permissions carefully. Extensions requesting 'Read and change all data on all websites' carry the highest risk. Current trust score: 50.5/100.
Is Cipher open source?
Check Cipher's listing for source code availability. Open-source Firefox add-ons can be independently audited. Trust score: 50.5/100.
API: /v1/preflight Trust Badge API Docs

Disclaimer: Nerq trust scores are automated assessments based on publicly available signals. They are not endorsements or guarantees. Always conduct your own due diligence.