Is Simple Calendar Safe?
Simple Calendar — Nerq Trust Score 48.5/100 (D grade). Based on analysis of 2 trust dimensions, it is has notable safety concerns. Last updated: 2026-05-13.
Exercise caution with Simple Calendar. Simple Calendar is a Firefox extension with a Nerq Trust Score of 48.5/100 (D), based on 3 independent data dimensions. 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: 2026-03-22. Machine-readable data (JSON).
Is Simple Calendar safe?
NO — USE WITH CAUTION — Simple Calendar has a Nerq Trust Score of 48.5/100 (D). It has below-average trust signals with significant gaps in security, maintenance, or documentation. Not recommended for production use without thorough manual review and additional security measures.
What is Simple Calendar's trust score?
Simple Calendar has a Nerq Trust Score of 48.5/100, earning a D grade. This score is based on 2 independently measured dimensions including security, maintenance, and community adoption.
What are the key security findings for Simple Calendar?
Simple Calendar's strongest signal is security at 90/100. No known vulnerabilities have been detected. It has not yet reached the Nerq Verified threshold of 70+.
What is Simple Calendar and who maintains it?
| Author | Morreriar |
| Category | Firefox Add-ons |
| Source | N/A |
Similar Firefox by Trust Score
Compare
Safety Guide: Simple Calendar
What is Simple Calendar?
Simple Calendar is a Firefox add-on — A lightweight calendar.
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=Simple Calendar
Key Safety Concerns for Firefox add-on
When evaluating any Firefox add-on, watch for: excessive permissions, data harvesting.
Trust Assessment
Simple Calendar has a Nerq Trust Score of 48/100 (D) 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
- Simple Calendar has a Trust Score of 48/100 (D).
- Review carefully before use — below trust threshold.
- Always verify independently using the Nerq API.
Detailed Score Analysis
| Dimension | Score |
|---|---|
| Security | 90/100 |
| Maintenance | 50/100 |
| Popularity | 15/100 |
| Quality | 30/100 |
| Community | 35/100 |
Based on 5 dimensions. Data from addons.mozilla.org metadata, permissions analysis, and source code availability.
What data does Simple Calendar collect?
Privacy assessment for Simple Calendar is not yet available. See our methodology for how Nerq measures privacy, or the public privacy review for any community-contributed notes.
Is Simple Calendar secure?
Security score: 90/100. This meets the recommended security threshold for production use.
Nerq monitors this entity against NVD, OSV.dev, and registry-specific vulnerability databases for ongoing security assessment.
Full analysis: Simple Calendar Security Report
How we calculated this score
Simple Calendar's trust score of 48.5/100 (D) 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 (15/100), quality (30/100), 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.
This page was last reviewed on May 13, 2026. Data version: 0.0.
Full methodology documentation · Machine-readable data (JSON API)
Frequently Asked Questions
Is Simple Calendar Safe?
What is Simple Calendar's trust score?
What are safer alternatives to Simple Calendar?
What permissions does Simple Calendar need?
Is Simple Calendar open source?
Popular in Firefox Add-ons
Browse Categories
See Also
Disclaimer: Nerq trust scores are automated assessments based on publicly available signals. They are not endorsements or guarantees. Always conduct your own due diligence.