Is "Text Fragment" on Firefox Add-ons Safe to Install?

sycxyc · firefox · v1.4

Text fragment (#:~:text) allow linking directly to a specific portion of text in a web document, without requiring the author to annotate it with an ID, using particular syntax in the URL fragment. it could be used to generate more effective content-sharing links for users to pass to one another. Notes: * Firefox for Android currently does not support the context menu, you need to click on the extension icon instead. * In Firefox 131 or later, the browser's native "scroll to text fragment" implementation will be used by default. If you wish to use this extension's implementation, you can either uncheck "Disable this extension feature when natively supported" in this extension's preferences page, or disable "dom.text_fragments.enabled" in "about:config" and restart the browser. Specification: * https://wicg.github.io/scroll-to-text-fragment/ This extension is open source and you can file bug reports on the GitHub issue .

Risk Assessment

Analyzed
49.91
out of 100
MEDIUM

64 security findings detected across all analyzers

Firefox extension requesting 6 permissions

Severity Breakdown

0
Critical
35
High
29
Medium
0
Low
0
Info

Finding Categories

35
Malware Signatures
28
IoC Indicators

YARA Rules Matched

4 rules(35 hits)
postinstall system command postinstall obfuscation postinstall crypto operations postinstall file manipulation

Requested Permissions

6 permissions
<all_urls>

Access and modify data on every website you visit

Dangerous
clipboardWrite
Low
find
Low
menus
Low
storage
Low
webNavigation
Low

About This Extension

Text fragment (#:~:text) allow linking directly to a specific portion of text in a web document, without requiring the author to annotate it with an ID, using particular syntax in the URL fragment. it could be used to generate more effective content-sharing links for users to pass to one another. Notes: * Firefox for Android currently does not support the context menu, you need to click on the extension icon instead. * In Firefox 131 or later, the browser's native "scroll to text fragment" implementation will be used by default. If you wish to use this extension's implementation, you can either uncheck "Disable this extension feature when natively supported" in this extension's preferences page, or disable "dom.text_fragments.enabled" in "about:config" and restart the browser. Specification: * <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/9df1c5c47c5be5fa3b4640a5b78f96ab563bf20d839482e7da278f719084994e/https%3A//wicg.github.io/scroll-to-text-fragment/" rel="nofollow">https://wicg.github.io/scroll-to-text-fragment/</a> This extension is open source and you can file bug reports on the <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/0bd12565f74b89662e0df097bbc88c117fc0caa5f20b20b9e9d140d5bb58d641/https%3A//github.com/ichaoX/ext-textFragment/issues" rel="nofollow">GitHub issue</a>.

Detailed Findings

36 total

YARA Rule Matches

4 rules

Indicators of Compromise

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

URLs
7
IP Addresses
1
Domains
18
Strings
28

All Indicators · 28

URL
detected URL: https://bugzilla.mozilla.org/show_bug.cgi?id=1385548

XIOC detected URL: https://bugzilla.mozilla.org/show_bug.cgi?id=1385548

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: save.click

XIOC detected Domain: save.click

extracted_from_files

Domain
detected Domain: nodefilter.show

XIOC detected Domain: nodefilter.show

extracted_from_files

Other
detected Email: [email protected]

XIOC detected Email: [email protected]

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: https://bugzilla.mozilla.org/show_bug.cgi?id=1891736

XIOC detected URL: https://bugzilla.mozilla.org/show_bug.cgi?id=1891736

extracted_from_files

Domain
detected Domain: t51fb44cdbfbdc2412daff3993e8993d1.4624ed981755ea7781b4f10a6e91da64.addons.mozilla.org

XIOC detected Domain: t51fb44cdbfbdc2412daff3993e8993d1.4624ed981755ea7781b4f10a6e91da64.addons.mozilla.org

extracted_from_files

Domain
detected Domain: browser.storage

XIOC detected Domain: browser.storage

extracted_from_files

Domain
detected Domain: settings.auto

XIOC detected Domain: settings.auto

extracted_from_files

Domain
detected Domain: tab.id

XIOC detected Domain: tab.id

extracted_from_files

Domain
detected Domain: frames.map

XIOC detected Domain: frames.map

extracted_from_files

Domain
detected Domain: www.w3.org

XIOC detected Domain: www.w3.org

extracted_from_files

Domain
detected Domain: rrect.top

XIOC detected Domain: rrect.top

extracted_from_files

Domain
detected Domain: signingca1.addons.mozilla.org

XIOC detected Domain: signingca1.addons.mozilla.org

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: example.com

XIOC detected Domain: example.com

extracted_from_files

Domain
detected Domain: console.info

XIOC detected Domain: console.info

extracted_from_files

Domain
detected Domain: bugzilla.mozilla.org

XIOC detected Domain: bugzilla.mozilla.org

extracted_from_files

Hash
detected MD5 Hash: 4624ed981755ea7781b4f10a6e91da64

XIOC detected MD5 Hash: 4624ed981755ea7781b4f10a6e91da64

extracted_from_files

Domain
detected Domain: browser.management

XIOC detected Domain: browser.management

extracted_from_files

URL
detected URL: https://bugzilla.mozilla.org/show_bug.cgi?id=1914978

XIOC detected URL: https://bugzilla.mozilla.org/show_bug.cgi?id=1914978

extracted_from_files

URL
detected URL: https://bugzilla.mozilla.org/show_bug.cgi?id=1918589

XIOC detected URL: https://bugzilla.mozilla.org/show_bug.cgi?id=1918589

extracted_from_files

URL
detected URL: https://wicg.github.io/scroll-to-text-fragment/#textdirectiveexplicitchar

XIOC detected URL: https://wicg.github.io/scroll-to-text-fragment/#textdirectiveexplicitchar

extracted_from_files

IP
detected IP: ::

XIOC detected IP: ::

extracted_from_files

Domain
detected Domain: wicg.github.io

XIOC detected Domain: wicg.github.io

extracted_from_files

Security Analysis Summary

Security Analysis Overview

Text Fragment is a Firefox Add-ons extension published by sycxyc. Version 1.4 has been analyzed by the Risky Plugins security platform, receiving a risk score of 49.91/100 (MEDIUM risk) based on 64 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: 35 finding(s)
  • Medium: 29 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

Text Fragment is published by sycxyc on the Firefox Add-ons marketplace. The extension has approximately 977 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.

Frequently Asked Questions