extenshi.io
SECURITY REPORT · EXTENSHI SCAN

ExpressVPN: VPN proxy for a better internet

Firefox extension·by ExpressVPN
78
/ 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

ExpressVPN: VPN proxy for a better internet's safety score vs every other extension we've scanned
Globally
34%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 409,539 extensions
In Privacy & Security
27%of privacy & security extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 12,541 privacy & security extensions
Findings
22
median 5Lower is safer
Critical findings
3
median 0Severity = Critical
Permissions
12
median 4Declared in manifest
Active users
58007
median 3vs category median

Findings breakdown

Automated security signal · 22 distinct issues across 6 severities
22
distinct issues
detected
Scanners reported 27 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

8 risky permissions of 12 total
2 critical permissions require attention
This extension requests 12 permissions in total. 8 of them grant broad capabilities that are worth a careful look.
Critical
Communicate with desktop apps

Can exchange messages with applications installed on your computer

Critical
Access to all websites

Can read and modify content on every website you visit

High
View open tabs

Can see URLs and titles of all open tabs

High
Control proxy settings

Can route your browser traffic through a proxy server

High
Access browser cookies

Can read and modify cookies, potentially accessing login sessions

High
Control privacy settings

Can modify browser privacy settings like Do Not Track and safe browsing

Medium
Store local data

Can save data locally in the browser for persistence

Medium
Unlimited local storage

Can store large amounts of data locally without size limits

Medium
Show notifications

Can display desktop notifications outside the browser

Low
Block network requests (declarative)

Can block or redirect network requests using predefined rules without seeing content

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Scan performed by extenshi.io · Jul 25, 2026
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