SECURITY REPORT · EXTENSHI SCAN
Browser MCP
Firefox extension·by EC
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
Browser MCP's safety score vs every other extension we've scanned
Globally
77.77%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
67.77%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
7
median 38Lower is safer
Risky permissions
9
median 1Critical + high perms
Total permissions
14
median 4All declared perms
Critical findings
1
median 2Severity = Critical
Findings breakdown
Automated security signal · 7 distinct issues across 6 severities
7
distinct issues
detected
detected
Scanners reported 12 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical114%
High00%
Needs Review00%
Medium114%
Low571%
Info00%
Permissions requested
9 risky permissions of 14 total
2 critical permissions require attention
This extension requests 14 permissions in total. 9 of them grant broad capabilities that are worth a careful look.
Critical
Access to all websites
Can read and modify content on every website you visit
Critical
Manage other extensions
Can enable, disable, or uninstall other browser extensions
High
View open tabs
Can see URLs and titles of all open tabs
High
Observe web requests
Can monitor all network requests made by the browser
High
Access browsing history
Can read and modify your complete browsing history
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
Monitor navigation
Can observe and track tab navigation events and URL changes
Medium
Access bookmarks
Can read and modify your saved bookmarks
Medium
Show notifications
Can display desktop notifications outside the browser
Are you the author of Browser MCP?
Claim this extension to respond to findings, add context, and earn a verified badge on extenshi.io.
Add the badge to your README
Show Browser MCP'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.