SECURITY REPORT · EXTENSHI SCAN
MarkAsVisited
Firefox extension·by Hersing
0
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.
Likely abandonedsafety score reduced by 30 points
- No update in over 5 years
Why this matters
An unmaintained extension keeps whatever flaws it shipped with, and a listing with users but no owner is an attractive target to buy and repurpose.
Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue
How it ranks
MarkAsVisited's safety score vs every other extension we've scanned
Globally
58%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Other
25%of other extensions carry more risk
Riskier ←→ Safer
Ranked against 26,888 other extensions
Findings
7
median 3Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
1
median 2vs category median
Findings breakdown
Automated security signal · 7 distinct issues across 6 severities
7
distinct issues
detected
detected
Critical00%
High114%
Needs Review00%
Medium571%
Low114%
Info00%
Permissions requested
1 risky permission of 4 total
1 high-risk permission require attention
This extension requests 4 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
High
Access browsing history
Can read and modify your complete browsing history
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Medium
Add context menu items
Can add custom items to the right-click context menu
Medium
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Aug 17, 2026
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