Is Flagfox Safe?
Flagfox — Nerq Trust Score 52.8/100 (C- grade). Score based on 2 independent trust signals. Last analyzed: 2026-04-12
Flagfox is a Firefox extension with a Nerq Trust Score of 52.8/100 (C-), based on 3 independent data dimensions. Last analyzed: 2026-04-12 Security: 90/100. Popularity: 30/100. Data sourced from addons.mozilla.org metadata, permissions analysis, and source code availability. Last updated: 2026-04-12. Machine-readable data (JSON).
Is Flagfox safe?
Trust Score Breakdown — Flagfox has a Nerq Trust Score of 52.8/100 (C-). Measured across 2 independent trust signals (as of 2026-04-12).
What is Flagfox's trust score?
Flagfox has a Nerq Trust Score of 52.8/100, earning a C- grade. This score is based on 2 independently measured dimensions including security, maintenance, and community adoption.
What are the key security findings for Flagfox?
Flagfox's strongest signal is security at 90/100. No known vulnerabilities have been detected.
What is Flagfox and who maintains it?
| Author | Dave G |
| Category | Firefox Add-ons |
| Source | N/A |
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Safety Guide: Flagfox
What is Flagfox?
Flagfox is a Firefox add-on — Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shorteni.
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=Flagfox
Key Safety Concerns for Firefox add-on
When evaluating any Firefox add-on, watch for: excessive permissions, data harvesting.
Measured Signals
Flagfox has a Nerq Trust Score of 53/100 (C-). This score is a composite of automated measurements of security, maintenance, community, and quality signals.
Key Takeaways
- Flagfox has a Trust Score of 53/100 (C-).
- The score is a measured composite — it is not a suitability judgment. Evaluate the individual signals against your own requirements.
- Query the current measured values via the Nerq API.
Detailed Score Analysis
| Dimension | Score |
|---|---|
| Security | 90/100 |
| Maintenance | 50/100 |
| Popularity | 30/100 |
| Quality | 40/100 |
| Community | 35/100 |
Based on 5 dimensions. Data from addons.mozilla.org metadata, permissions analysis, and source code availability.
What data does Flagfox collect?
Flagfox has a privacy score of 90/100. Review the documentation and privacy policy for data handling details.
Full analysis: Flagfox Privacy Report · Privacy review
Is Flagfox secure?
Security score: 90/100 (0-100, higher = fewer measured security issues).
Nerq monitors this entity against NVD, OSV.dev, and registry-specific vulnerability databases for ongoing security assessment.
Full analysis: Flagfox Security Report
How we calculated this score
Flagfox's trust score of 52.8/100 (C-) is computed from addons.mozilla.org metadata, permissions analysis, and source code availability. The score reflects 5 independent dimensions: security (90/100), maintenance (50/100), popularity (30/100), quality (40/100), community (35/100). Each dimension is weighted equally to produce the composite trust score.
Nerq analyzes over 7.5 million entities across 26 registries using the same methodology, enabling direct cross-entity comparison. Scores are updated continuously as new data becomes available.
Signals last measured on April 12, 2026. Data version: 1.0.
Full methodology documentation · Machine-readable data (JSON API)
Frequently Asked Questions
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Disclaimer: Nerq trust scores are automated measurements based on publicly available signals. They are not endorsements, verdicts, or guarantees of suitability. Always evaluate the signals against your own requirements.