SECURITY REPORT · EXTENSHI SCAN
MarkShelf
Firefox extension·by WayJam
0
/ 100 SAFETY SCORE
CAUTION
Mostly fine, but a few things worth reviewing before you install.
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
MarkShelf's safety score vs every other extension we've scanned
Globally
74.61%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
64.61%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
21
median 38Lower is safer
Risky permissions
2
median 1Critical + high perms
Total permissions
6
median 4All declared perms
Critical findings
0
median 2Severity = Critical
Findings breakdown
Automated security signal · 21 findings across 5 severities
21
findings
detected
detected
Critical00%
High15%
Medium1257%
Low524%
Info314%
Permissions requested
2 risky permissions of 6 total
2 high-risk permissions require attention
This extension requests 6 permissions in total. 2 of them grant broad capabilities that are worth a careful look.
High
View open tabs
Can see URLs and titles of all open tabs
High
Execute scripts in pages
Can inject and execute JavaScript code in web pages
Medium
Access bookmarks
Can read and modify your saved bookmarks
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Add context menu items
Can add custom items to the right-click context menu
Low
Schedule tasks
Can schedule periodic background tasks
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Scan performed by extenshi.io · Jun 25, 2026· partial run (some scanners failed)
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