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No code review on record

We have not reviewed this extension’s code, so we cannot vouch for it either way. Check the permissions below to decide whether it asks for more than it needs.

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What our analysis found

MetaMask is not yet reviewed by Extension Auditor. Its permissions mean it can read and change data on all websites and can observe network requests. It comes from a publisher with 58 extensions and was last updated in August 2025.

MetaMask Firefox extension security report

ID: metamask-walletm

Extension Info & Metadata

Status
Active
Version
12.1.0
Size
0.52 MB
Rating
4.7/5
Reviews
29
Users
1
Type
Extension
Updated
Aug 9, 2025
Category
N/A
Price
Free
Featured
No
Visibility
Listed
Mature
No
By Google
No
Trusted
No
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Firefox Add-ons
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This publisherTrack record
58extensions
All still listed

Publisher Contextual Analysis

Author
MetaMask
Privacy
Privacy Policy
Website
Visit
Extensions
58
Active
32
Obsolete
0
Listed
58
Unlisted
0
Users
3,470,403

Install growth

Item
Type
Severity
Description
webRequest
Permission
Critical
This permission enables the extension to monitor and analyze all web requests made by the browser. Rated Critical because it can observe all network traffic including sensitive data, track browsing behavior, and gather authentication tokens.
<all_urls>
Host
Critical
Broad host access — the extension can read/modify content on every website.
clipboardRead
Permission
High
This permission allows reading clipboard content. Rated High because it can steal copied passwords, sensitive data, and monitor all content copied to clipboard.
Contextual Risk Factors
Risk Factor
High
The following context increases the overall risk:• 20% increase: Access to sensitive domains increases potential impact
Broad Host Permissions
Risk Factor
High
This extension has broad host permissions allowing it to access many or all websites.
storage
Permission
Medium
This permission allows storing data locally in the browser. Rated Medium because it can persist sensitive user data, track user activities over time, and potentially store malicious payloads.
tabs
Permission
Medium
This permission enables tab management and monitoring. Rated Medium because it can track open tabs, access tab metadata, and monitor user browsing patterns.
https://888surprising.pythonanywhere.com/*
Host
Medium
Host permission — access limited to this URL pattern.
http://localhost:5000/*
Host
Medium
Host permission — access limited to this URL pattern.
Access to Sensitive Domains
Risk Factor
Medium
This extension requests access to sensitive domains: https://888surprising.pythonanywhere.com/*

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About this extension

MetaMask is the most secure wallet for crypto, NFTs, and DeFi, trusted by millions of users

User reviews

Extension files

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URLs
1

URLs

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No IP addresses found

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Version
Size
Verdict
Findings
Permhash
12.1.0
Latest
0.52 MBNot scanned—
4d6359128bc0101c37d22ab9766c30578bf8610b3b71fd06e1e8894d2f37ad6d
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