extenshi.io
SECURITY REPORT · EXTENSHI SCAN

InboxToKindle

Firefox extension·by Luis Natera
81
/ 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

InboxToKindle's safety score vs every other extension we've scanned
Globally
41%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 402,636 extensions
In Social & Communication
22%of social & communication extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 13,646 social & communication extensions
Findings
15
median 5Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
6
median 3Declared in manifest
Active users
0
median 3vs category median

Findings breakdown

Automated security signal · 15 distinct issues across 6 severities
15
distinct issues
detected

Permissions requested

2 risky permissions of 6 total
1 critical permission require attention
This extension requests 6 permissions in total. 2 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

High
View open tabs

Can see URLs and titles of all open tabs

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

Info
https://inboxtokindle.com/*

No additional information available.

Info
https://substacktokindle.com/*

No additional information available.

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Scan performed by extenshi.io · Aug 12, 2026
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