SECURITY REPORT · EXTENSHI SCAN
Online Markdown Viewer with HTML Preview
Firefox extension·by mdapp leadtech
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
Online Markdown Viewer with HTML Preview's safety score vs every other extension we've scanned
Globally
73.4%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
63.400000000000006%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
56
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 · 56 distinct issues across 6 severities
56
distinct issues
detected
detected
Scanners reported 173 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical00%
High47%
Needs Review00%
Medium3664%
Low1629%
Info00%
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
Execute scripts in pages
Can inject and execute JavaScript code in web pages
High
Manage downloads
Can initiate downloads and access your download history
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Custom menus
Can add custom items to the browser context menu
Medium
Write to clipboard
Can place content onto your clipboard
Are you the author of Online Markdown Viewer with HTML Preview?
Claim this extension to respond to findings, add context, and earn a verified badge on extenshi.io.
Add the badge to your README
Show Online Markdown Viewer with HTML Preview's live security score on GitHub or in your docs
Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
Browser extensions made transparent.