Is Download Filename Encoding safe to use?

Download Filename Encoding has a security risk score of 49.45/100 (MEDIUM risk). Our security analysis detected 29 findings. Review the detailed security assessment below to understand the specific risks before installation.

What are the security risks of Download Filename Encoding?

Based on our automated security analysis, Download Filename Encoding presents medium risk level. The extension is analyzed for malware patterns, secret exposure, network communications, permissions, and supply chain vulnerabilities.

How is the security score calculated?

Risky Plugins calculates security scores using weighted categories: severity of findings (25 points max), malware detections (35 points), secret exposure (28 points), network communications (10 points), and obfuscation (10 points). Scores range from 0-100, with higher scores indicating greater risk.

What does CRITICAL, HIGH, MEDIUM, LOW, MINIMAL risk mean?

CRITICAL (80-100): Severe security issues like malware. HIGH (60-79): Significant vulnerabilities. MEDIUM (40-59): Moderate security concerns. LOW (20-39): Minor issues. MINIMAL (0-19): Very low risk. Always review findings before installing any extension.

Is "Download Filename Encoding" on Firefox Add-ons Safe to Install?

Name: Download Filename Encoding
Availability: InStock
Rating: 4.8438 (64 reviews)
Author: jingyu9575

jingyu9575 · firefox · v2.1resigned1

Update: Version 2.0 adds an icon for quick switching. It is not possible to hide it by default. If you do not want it, right-click and remove the icon. Note: Firefox 57 has a bug that prevents this extension from working. Please update to Firefox 58 or later. Legacy websites sometimes provide filenames of downloads without character encoding information, so Firefox cannot decode them correctly and give you incorrect, unreadable filenames. This extension tries to fix this problem by setting a default encoding for download filenames. After installing you can configure this extension by clicking Preferences of it in the Add-ons Manager. Set the default encoding in the "Encoding" text box, which is often the standard encoding of your country/language (e.g. "GBK" for Chinese). Check "Detect UTF-8" to try UTF-8 (international standard encoding) first and fall back to the encoding above. Check "Detect percent encoding" to fix filenames that are percent encoded e.g. %20%20. Permissions: * Access your data for all websites. It is required to modify download filenames for all websites. This extension does not store or upload your browsing data.

Risk Assessment

Analyzed

49.45

out of 100

MEDIUM

29 security findings detected across all analyzers

Firefox extension requesting 5 permissions

Severity Breakdown

Critical

High

Medium

Low

Info

Finding Categories

Malware Signatures

IoC Indicators

YARA Rules Matched

5 rules(8 hits)

postinstall file download postinstall network communication postinstall system command postinstall file manipulation postinstall obfuscation

Requested Permissions

5 permissions

<all_urls>

Access and modify data on every website you visit

Dangerous

webRequest

Intercept, modify, and block all network requests

High

webRequestBlocking

Block network requests before they complete

High

storage

Low

menus

Low

About This Extension

<b>Update: </b> Version 2.0 adds an icon for quick switching. It is not possible to hide it by default. If you do not want it, right-click and remove the icon. <b>Note: </b> Firefox 57 has a bug that prevents this extension from working. Please update to Firefox 58 or later. Legacy websites sometimes provide filenames of downloads without character encoding information, so Firefox cannot decode them correctly and give you incorrect, unreadable filenames. This extension tries to fix this problem by setting a default encoding for download filenames. After installing you can configure this extension by clicking Preferences of it in the Add-ons Manager. Set the default encoding in the "Encoding" text box, which is often the standard encoding of your country/language (e.g. "GBK" for Chinese). Check "Detect UTF-8" to try UTF-8 (international standard encoding) first and fall back to the encoding above. Check "Detect percent encoding" to fix filenames that are percent encoded e.g. %20%20. Permissions: * Access your data for all websites. It is required to modify download filenames for all websites. This extension does not store or upload your browsing data.

Detailed Findings

9 total

YARA Rule Matches

5 rules

Indicators of Compromise

Network indicators, suspicious strings, and potential IoCs extracted during analysis

URLs

IP Addresses

Domains

Strings

All Indicators · 20

URL

detected URL: http://www.w3.org/1999/02/22-rdf-syntax-ns#

XIOC detected URL: http://www.w3.org/1999/02/22-rdf-syntax-ns#

extracted_from_files

Hash

detected MD5 Hash: 1c6732cb3213d16a4a6a1189cf5697c8

XIOC detected MD5 Hash: 1c6732cb3213d16a4a6a1189cf5697c8

extracted_from_files

detected Domain: sodipodi.sourceforge.net

XIOC detected Domain: sodipodi.sourceforge.net

extracted_from_files

Domain

detected Domain: www.inkscape.org

XIOC detected Domain: www.inkscape.org

extracted_from_files

Domain

detected Domain: www.example.com

XIOC detected Domain: www.example.com

extracted_from_files

URL

detected URL: http://addons.mozilla.org/ca/crl.pem0N

XIOC detected URL: http://addons.mozilla.org/ca/crl.pem0N

extracted_from_files

URL

detected URL: http://purl.org/dc/elements/1.1/

XIOC detected URL: http://purl.org/dc/elements/1.1/

extracted_from_files

URL

detected URL: http://creativecommons.org/ns#

XIOC detected URL: http://creativecommons.org/ns#

extracted_from_files

URL

detected URL: http://purl.org/dc/dcmitype/StillImage

XIOC detected URL: http://purl.org/dc/dcmitype/StillImage

extracted_from_files

Domain

detected Domain: mozilla.com

XIOC detected Domain: mozilla.com

extracted_from_files

Domain

detected Domain: addons.mozilla.org

XIOC detected Domain: addons.mozilla.org

extracted_from_files

Domain

detected Domain: content-signature.mozilla.org

XIOC detected Domain: content-signature.mozilla.org

extracted_from_files

Domain

detected Domain: te94f66bf0cbeeb7c3f1467a08707fdf1.1c6732cb3213d16a4a6a1189cf5697c8.addons.mozilla.org

XIOC detected Domain: te94f66bf0cbeeb7c3f1467a08707fdf1.1c6732cb3213d16a4a6a1189cf5697c8.addons.mozilla.org

extracted_from_files

URL

detected Domain: purl.org

XIOC detected Domain: purl.org

extracted_from_files

Domain

detected Domain: creativecommons.org

XIOC detected Domain: creativecommons.org

extracted_from_files

Domain

detected Domain: www.w3.org

XIOC detected Domain: www.w3.org

extracted_from_files

URL

detected URL: http://www.inkscape.org/namespaces/inkscape

XIOC detected URL: http://www.inkscape.org/namespaces/inkscape

extracted_from_files

URL

detected URL: http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd

XIOC detected URL: http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd

extracted_from_files

URL

detected URL: http://www.w3.org/2000/svg

XIOC detected URL: http://www.w3.org/2000/svg

extracted_from_files

Domain

detected Domain: signingca1.addons.mozilla.org

XIOC detected Domain: signingca1.addons.mozilla.org

extracted_from_files

Security Analysis Summary

Security Analysis Overview

Download Filename Encoding is a Firefox Add-ons extension published by jingyu9575. Version 2.1resigned1 has been analyzed by the Risky Plugins security platform, receiving a risk score of 49.45/100 (MEDIUM risk) based on 29 security findings.

Risk Assessment

This extension presents moderate security risk. Several findings were detected that may warrant attention. Users should carefully review the permissions and findings before installation.

Findings Breakdown

High: 8 finding(s)
Medium: 21 finding(s)

What Was Analyzed

The security assessment covers multiple analysis categories:

Malware Detection: YARA rule matching against 2,400+ malware signatures
Secret Detection: Scanning for exposed API keys, tokens, and credentials
Static Analysis: Code-level security analysis for common vulnerability patterns
Network Analysis: Detection of suspicious network communications and endpoints
Obfuscation Detection: Identification of code obfuscation techniques

Developer Information

Download Filename Encoding is published by jingyu9575 on the Firefox Add-ons marketplace. The extension has approximately 825 users.

Recommendation

Exercise caution with this extension. Review the detailed findings and ensure the requested permissions align with the extension's stated functionality before installation.

Source Code Viewer

Source Code Not Available

Source code is not available for this version of the extension.

Frequently Asked Questions

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Risk Assessment

Severity Breakdown

Finding Categories

YARA Rules Matched

Requested Permissions

About This Extension

Detailed Findings

MANIFEST-SENSITIVE-PERM-<ALL_URLS>

YARA Rule Matches

postinstall file download

postinstall network communication

postinstall system command

postinstall file manipulation

postinstall obfuscation

Indicators of Compromise

All Indicators · 20

Security Analysis Summary

Security Analysis Overview

Risk Assessment

Findings Breakdown

What Was Analyzed

Developer Information

Recommendation

Frequently Asked Questions

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