SECURITY REPORT · EXTENSHI SCAN
Privacy Possum
Firefox extension·by cowlicks
0
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.
Likely abandonedsafety score reduced by 30 points
- No update in over 7 years
Why this matters
An unmaintained extension keeps whatever flaws it shipped with, and a listing with users but no owner is an attractive target to buy and repurpose.
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
Privacy Possum's safety score vs every other extension we've scanned
Globally
6%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Privacy & Security
5%of privacy & security extensions carry more risk
Riskier ←→ Safer
Ranked against 11,537 privacy & security extensions
Findings
31
median 5Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
11
median 4Declared in manifest
Active users
34630
median 3vs category median
Findings breakdown
Automated security signal · 31 distinct issues across 6 severities
31
distinct issues
detected
detected
Scanners reported 32 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical26%
High1135%
Needs Review00%
Medium1548%
Low26%
Info13%
Permissions requested
6 risky permissions of 11 total
6 high-risk permissions require attention
This extension requests 11 permissions in total. 6 of them grant broad capabilities that are worth a careful look.
High
View open tabs
Can see URLs and titles of all open tabs
High
Access all HTTP sites
Can read and modify content on all non-encrypted websites
High
Access all HTTPS sites
Can read and modify content on all encrypted websites
High
Observe web requests
Can monitor all network requests made by the browser
High
Block and modify web requests
Can intercept, block, or modify any network request before it completes
High
Access browser cookies
Can read and modify cookies, potentially accessing login sessions
Medium
Add context menu items
Can add custom items to the right-click context menu
Medium
Monitor navigation
Can observe and track tab navigation events and URL changes
Medium
Store local data
Can save data locally in the browser for persistence
Info
*://twitter.com/*
No additional information available.
Info
*://tweetdeck.twitter.com/*
No additional information available.
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Scan performed by extenshi.io · Aug 24, 2026
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