Proton VPN: Fast & SecureSecurity Analysis

Chromev1.2.15MV3March 16, 2026 at 06:05 PM
Potentially unsafe

This extension shows concerning patterns that may indicate risky behavior. Proceed with caution.

6.4HIGH
6.4 HIGHRaw: 8.0

This extension shows significant risk signals. Review the findings below carefully before installing or continuing to use it.

Based on 14 permissions including high-risk ones, 37 code findings, 1 dangerous combination.

Trust Signals(5.0/10)

Users
1.0M
Rating
4.1(2K reviews)
Developer
Proton AG

Dangerous Combinations(1)

CRITICALNetwork interception + external communication

Extension intercepts network traffic and sends data externally — potential man-in-the-middle behavior.

webRequest/webRequestBlocking+external network request
Permissions
8.5/10
Code
9.4/10
Combinations
10.0/10
Manifest/CSP
1.2/10

Permissions(14 analyzed)

Code Findings(15 patterns, 37 total)

Content Security Policy

CSP Present(1 issue)
LOW
object-srcobject-src not restricted

object-src is not set to 'none'. Plugins like Flash can be embedded, which may allow code execution.

Manifest Analysis(1 finding)

LOW
externally_connectableExternal messaging enabled

Extension accepts messages from 1 external pattern(s). Verify these are trusted origins.

External Domains(10)

*account.proton.meaccount.protonvpn.comaddons.mozilla.orgchromewebstore.google.comip.meproton.meprotonvpn.comreports.proton.mevivaldi.com

Indicators of Compromise

14 indicators of compromise found

File Statistics

332
Total Files
8
JS Files
5.9 MB
Total Size

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