Is Block Site safe to use?

Block Site has a security risk score of 49.76/100 (MEDIUM risk). Our security analysis detected 184 findings. Review the detailed security assessment below to understand the specific risks before installation.

What are the security risks of Block Site?

Based on our automated security analysis, Block Site 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 "Block Site" on Firefox Add-ons Safe to Install?

Ray · firefox · v0.5.7

This extension will block access to websites of your choosing. A master password controls all customization options, as well as access to any blocked site. It’s also possible to redirect navigation from one specific website to another. Preview: https://www.youtube.com/watch?v=maE-gOUSH4c Features: 1. Block unwanted domains. 2. Prevent access to a range of websites using wildcard matching or regular expression matching. 3. Reverse mode allows access to only some hostnames and blocks access to all others. 4. Custom redirection; you can redirect a single blocked hostname to a new destination. 5. Display a custom message on blocked pages. 6. Time and date based blocking. Only block access to the websites at specified times and dates. This feature can be configured per hostname. 7. Protect data leakage. This extension prevents certain hostnames from gathering network activity from your computer, since blocking occurs before any network request is emitted to the server. 8. Auto-closes blocked tabs after a period of time. 10. Closes annoying pop-ups as soon as the opening request is received. 11. Pause and resume blocking from the right-click context menu of the toolbar button. 12. Supports overwriting configurations by managed storage For the FAQs and general feature suggestions please use: https://webextension.org/listing/block-site.html For technical bug reports use: https://github.com/ray-lothian/Block-Site/issues

Risk Assessment

Analyzed

49.76

out of 100

MEDIUM

184 security findings detected across all analyzers

Firefox extension requesting 8 permissions

Severity Breakdown

Critical

High

117

Medium

Low

Info

Finding Categories

Malware Signatures

Network

116

IoC Indicators

YARA Rules Matched

10 rules(67 hits)

postinstall file manipulation postinstall network communication postinstall persistence mechanism NoUseWeakRandom postinstall system command postinstall file download postinstall obfuscation postinstall crypto operations LocalStorageShouldNotBeUsed AlertStatementsShouldNotBeUsed

Requested Permissions

8 permissions

<all_urls>

Access and modify data on every website you visit

Dangerous

activeTab

Medium

storage

Low

notifications

Low

alarms

Low

contextMenus

Low

declarativeNetRequestWithHostAccess

Low

idle

Low

About This Extension

This extension will block access to websites of your choosing. A master password controls all customization options, as well as access to any blocked site. It’s also possible to redirect navigation from one specific website to another. Preview: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/d44b98f396878c6af46b22451c6fcbecf0934634c20e1be4b642df1b3d4984a6/https%3A//www.youtube.com/watch%3Fv=maE-gOUSH4c" rel="nofollow">https://www.youtube.com/watch?v=maE-gOUSH4c</a> Features: 1. Block unwanted domains. 2. Prevent access to a range of websites using wildcard matching or regular expression matching. 3. Reverse mode allows access to only some hostnames and blocks access to all others. 4. Custom redirection; you can redirect a single blocked hostname to a new destination. 5. Display a custom message on blocked pages. 6. Time and date based blocking. Only block access to the websites at specified times and dates. This feature can be configured per hostname. 7. Protect data leakage. This extension prevents certain hostnames from gathering network activity from your computer, since blocking occurs before any network request is emitted to the server. 8. Auto-closes blocked tabs after a period of time. 10. Closes annoying pop-ups as soon as the opening request is received. 11. Pause and resume blocking from the right-click context menu of the toolbar button. 12. Supports overwriting configurations by managed storage For the FAQs and general feature suggestions please use: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/7a2f16d729952b1cbe776326042c0b9d7956dca0db852ecb74512c58af884b91/https%3A//webextension.org/listing/block-site.html" rel="nofollow">https://webextension.org/listing/block-site.html</a> For technical bug reports use: <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/1da51d433ab23e9619a9c0473b31a0f5ede4222ce839c33414488d25735474f2/https%3A//github.com/ray-lothian/Block-Site/issues" rel="nofollow">https://github.com/ray-lothian/Block-Site/issues</a>

Detailed Findings

68 total

YARA Rule Matches

10 rules

Indicators of Compromise

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

URLs

IP Addresses

Domains

Strings

116

All Indicators · 116

detected IP: e::af

XIOC detected IP: e::af

extracted_from_files

URL

detected URL: https://addons.mozilla.org/firefox/addon/block-website/reviews/';

XIOC detected URL: https://addons.mozilla.org/firefox/addon/block-website/reviews/';

extracted_from_files

Domain

detected Domain: request.date

XIOC detected Domain: request.date

extracted_from_files

Domain

detected Domain: request.host

XIOC detected Domain: request.host

extracted_from_files

URL

detected URL: http://mozilla.org/MPL/2.0/.

XIOC detected URL: http://mozilla.org/MPL/2.0/.

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://github.com/ray-lothian/tld.js/releases/tag/0.1.0

XIOC detected URL: https://github.com/ray-lothian/tld.js/releases/tag/0.1.0

extracted_from_files

URL

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

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

extracted_from_files

URL

detected URL: https://github.com/ray-lothian/Block-Site/issues/6

XIOC detected URL: https://github.com/ray-lothian/Block-Site/issues/6

extracted_from_files

Domain

detected Domain: w.id

XIOC detected Domain: w.id

extracted_from_files

Domain

detected Domain: o.name

XIOC detected Domain: o.name

extracted_from_files

Domain

detected Domain: a.name

XIOC detected Domain: a.name

extracted_from_files

Domain

detected Domain: rules.map

XIOC detected Domain: rules.map

extracted_from_files

Domain

detected Domain: hasharray.map

XIOC detected Domain: hasharray.map

extracted_from_files

Domain

detected Domain: request.hosts.map

XIOC detected Domain: request.hosts.map

extracted_from_files

Domain

detected Domain: sender.tab.id

XIOC detected Domain: sender.tab.id

extracted_from_files

Domain

detected Domain: sp.map

XIOC detected Domain: sp.map

extracted_from_files

Domain

detected Domain: input.click

XIOC detected Domain: input.click

extracted_from_files

Domain

detected Domain: e.target.dataset.id

XIOC detected Domain: e.target.dataset.id

extracted_from_files

Domain

detected Domain: start.dataset.id

XIOC detected Domain: start.dataset.id

extracted_from_files

Domain

detected Domain: e.target

XIOC detected Domain: e.target

extracted_from_files

Domain

detected Domain: console.info

XIOC detected Domain: console.info

extracted_from_files

Domain

detected Domain: win.top

XIOC detected Domain: win.top

extracted_from_files

Domain

detected Domain: ns.adobe.com

XIOC detected Domain: ns.adobe.com

extracted_from_files

Domain

detected Domain: www.gimp.org

XIOC detected Domain: www.gimp.org

extracted_from_files

URL

detected Domain: purl.org

XIOC detected Domain: purl.org

extracted_from_files

Domain

detected Domain: e.dataset.id

XIOC detected Domain: e.dataset.id

extracted_from_files

Domain

detected Domain: add0n.com

XIOC detected Domain: add0n.com

extracted_from_files

Domain

detected Domain: www.bing.com

XIOC detected Domain: www.bing.com

extracted_from_files

Domain

detected Domain: www.youtube.com

XIOC detected Domain: www.youtube.com

extracted_from_files

Domain

detected Domain: evil.co.uk

XIOC detected Domain: evil.co.uk

extracted_from_files

Domain

detected Domain: co.uk

XIOC detected Domain: co.uk

extracted_from_files

Domain

detected Domain: example.org

XIOC detected Domain: example.org

extracted_from_files

Domain

detected Domain: rule.parts

XIOC detected Domain: rule.parts

extracted_from_files

Domain

detected Domain: www.mozilla.org

XIOC detected Domain: www.mozilla.org

extracted_from_files

Domain

detected Domain: webextension.org

XIOC detected Domain: webextension.org

extracted_from_files

Domain

detected Domain: div.info

XIOC detected Domain: div.info

extracted_from_files

Domain

detected Domain: relative.search

XIOC detected Domain: relative.search

extracted_from_files

Domain

detected Domain: result.host

XIOC detected Domain: result.host

extracted_from_files

Domain

detected Domain: not.evil.com

XIOC detected Domain: not.evil.com

extracted_from_files

Domain

detected Domain: vil.com

XIOC detected Domain: vil.com

extracted_from_files

Domain

detected Domain: evil.com

XIOC detected Domain: evil.com

extracted_from_files

URL

detected URL: https://www.youtube.com/watch?v=maE-gOUSH4c'

XIOC detected URL: https://www.youtube.com/watch?v=maE-gOUSH4c'

extracted_from_files

URL

detected URL: https://mathiasbynens.be/notes/javascript-encoding

XIOC detected URL: https://mathiasbynens.be/notes/javascript-encoding

extracted_from_files

URL

detected URL: https://webextension.org/listing/block-site.html

XIOC detected URL: https://webextension.org/listing/block-site.html

extracted_from_files

Domain

detected Domain: xs.map

XIOC detected Domain: xs.map

extracted_from_files

Domain

detected Domain: this.host

XIOC detected Domain: this.host

extracted_from_files

Domain

detected Domain: this.search

XIOC detected Domain: this.search

extracted_from_files

URL

detected Domain: url.prototype.format.call

XIOC detected Domain: url.prototype.format.call

extracted_from_files

Domain

detected Domain: relative.host

XIOC detected Domain: relative.host

extracted_from_files

Domain

detected Domain: result.search

XIOC detected Domain: result.search

extracted_from_files

Domain

detected Domain: mathiasbynens.be

XIOC detected Domain: mathiasbynens.be

extracted_from_files

Domain

detected Domain: tools.ietf.org

XIOC detected Domain: tools.ietf.org

extracted_from_files

Domain

detected Domain: code.google.com

XIOC detected Domain: code.google.com

extracted_from_files

Domain

detected Domain: foo.com

XIOC detected Domain: foo.com

extracted_from_files

Domain

detected Domain: www.example.com

XIOC detected Domain: www.example.com

extracted_from_files

Domain

detected Domain: freeglobal.global

XIOC detected Domain: freeglobal.global

extracted_from_files

Domain

detected Domain: object.prototype.hasownproperty.call

XIOC detected Domain: object.prototype.hasownproperty.call

extracted_from_files

Domain

detected Domain: o.host

XIOC detected Domain: o.host

extracted_from_files

Domain

detected Domain: o.search

XIOC detected Domain: o.search

extracted_from_files

Domain

detected Domain: window.top

XIOC detected Domain: window.top

extracted_from_files

Domain

detected Domain: chrome.google.com

XIOC detected Domain: chrome.google.com

extracted_from_files

Domain

detected Domain: microsoftedge.microsoft.com

XIOC detected Domain: microsoftedge.microsoft.com

extracted_from_files

Domain

detected Domain: addons.opera.com

XIOC detected Domain: addons.opera.com

extracted_from_files

Domain

detected Domain: mths.be

XIOC detected Domain: mths.be

extracted_from_files

Domain

detected Domain: ps.map

XIOC detected Domain: ps.map

extracted_from_files

Domain

detected Domain: read.plural.select

XIOC detected Domain: read.plural.select

extracted_from_files

Domain

detected Domain: date.now

XIOC detected Domain: date.now

extracted_from_files

Domain

detected Domain: alarm.name

XIOC detected Domain: alarm.name

extracted_from_files

Domain

detected Domain: github.com

XIOC detected Domain: github.com

extracted_from_files

Domain

detected Domain: www.w3.org

XIOC detected Domain: www.w3.org

extracted_from_files

Domain

detected Domain: location.search

XIOC detected Domain: location.search

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: t1a2a1293dae964c664e4f1d54a8ce28b.4d3fe5ea73bd6ff692fcc9d91f19f218.addons.mozilla.org

XIOC detected Domain: t1a2a1293dae964c664e4f1d54a8ce28b.4d3fe5ea73bd6ff692fcc9d91f19f218.addons.mozilla.org

extracted_from_files

Domain

detected Domain: www.google.com

XIOC detected Domain: www.google.com

extracted_from_files

Domain

detected Domain: r.id

XIOC detected Domain: r.id

extracted_from_files

Domain

detected Domain: prefs.map

XIOC detected Domain: prefs.map

extracted_from_files

Domain

detected Domain: tab.id

XIOC detected Domain: tab.id

extracted_from_files

detected IP: ::bef

XIOC detected IP: ::bef

extracted_from_files

detected IP: ::

XIOC detected IP: ::

extracted_from_files

detected IP: 9::

XIOC detected IP: 9::

extracted_from_files

detected IP: 0::

XIOC detected IP: 0::

extracted_from_files

Domain

detected Domain: mozilla.org

XIOC detected Domain: mozilla.org

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

URL

detected URL: https://mths.be/punycode

XIOC detected URL: https://mths.be/punycode

extracted_from_files

URL

detected URL: https://addons.opera.com/extensions/details/block-site-2/';

XIOC detected URL: https://addons.opera.com/extensions/details/block-site-2/';

extracted_from_files

URL

detected URL: https://tools.ietf.org/html/rfc3492#section-3.4

XIOC detected URL: https://tools.ietf.org/html/rfc3492#section-3.4

extracted_from_files

URL

detected URL: https://microsoftedge.microsoft.com/addons/detail/deiilejafkhhgekckholkdhfhopcnmeb';

XIOC detected URL: https://microsoftedge.microsoft.com/addons/detail/deiilejafkhhgekckholkdhfhopcnmeb';

extracted_from_files

URL

detected URL: https://chrome.google.com/webstore/detail/block-site/lebiggkccaodkkmjeimmbogdedcpnmfb/reviews/';

XIOC detected URL: https://chrome.google.com/webstore/detail/block-site/lebiggkccaodkkmjeimmbogdedcpnmfb/reviews/';

extracted_from_files

URL

detected URL: https://www.mozilla.org/en-US/MPL/

XIOC detected URL: https://www.mozilla.org/en-US/MPL/

extracted_from_files

URL

detected URL: https://github.com/lunu-bounir/notification-view

XIOC detected URL: https://github.com/lunu-bounir/notification-view

extracted_from_files

URL

detected URL: https://github.com/oncletom/tld.js/issues/95

XIOC detected URL: https://github.com/oncletom/tld.js/issues/95

extracted_from_files

URL

detected URL: http://www.example.com

XIOC detected URL: http://www.example.com

extracted_from_files

URL

detected URL: http://foo.com

XIOC detected URL: http://foo.com

extracted_from_files

URL

detected URL: https://code.google.com/p/chromium/issues/detail?id=25916

XIOC detected URL: https://code.google.com/p/chromium/issues/detail?id=25916

extracted_from_files

URL

detected URL: https://github.com/joyent/node/issues/1707

XIOC detected URL: https://github.com/joyent/node/issues/1707

extracted_from_files

URL

detected URL: http://ns.adobe.com/xap/1.0/

XIOC detected URL: http://ns.adobe.com/xap/1.0/

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://www.gimp.org/xmp/

XIOC detected URL: http://www.gimp.org/xmp/

extracted_from_files

URL

detected URL: http://ns.adobe.com/exif/1.0/

XIOC detected URL: http://ns.adobe.com/exif/1.0/

extracted_from_files

URL

detected URL: http://ns.adobe.com/tiff/1.0/

XIOC detected URL: http://ns.adobe.com/tiff/1.0/

extracted_from_files

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

URL

detected URL: https://webextension.org/custom-component/notification-view/index.html

XIOC detected URL: https://webextension.org/custom-component/notification-view/index.html

extracted_from_files

URL

detected URL: https://github.com/ray-lothian/Block-Site/issues/51

XIOC detected URL: https://github.com/ray-lothian/Block-Site/issues/51

extracted_from_files

URL

detected URL: https://add0n.com/block-site.html#faq15

XIOC detected URL: https://add0n.com/block-site.html#faq15

extracted_from_files

URL

detected URL: https://www.bing.com

XIOC detected URL: https://www.bing.com

extracted_from_files

URL

detected URL: https://github.com/ray-lothian/Block-Site/issues/111

XIOC detected URL: https://github.com/ray-lothian/Block-Site/issues/111

extracted_from_files

URL

detected URL: https://github.com/ray-lothian/Block-Site/issues/85

XIOC detected URL: https://github.com/ray-lothian/Block-Site/issues/85

extracted_from_files

URL

detected URL: http://ns.adobe.com/xap/1.0/sType/ResourceEvent#

XIOC detected URL: http://ns.adobe.com/xap/1.0/sType/ResourceEvent#

extracted_from_files

URL

detected URL: http://ns.adobe.com/xap/1.0/mm/

XIOC detected URL: http://ns.adobe.com/xap/1.0/mm/

extracted_from_files

Hash

detected MD5 Hash: 4d3fe5ea73bd6ff692fcc9d91f19f218

XIOC detected MD5 Hash: 4d3fe5ea73bd6ff692fcc9d91f19f218

extracted_from_files

Domain

detected Domain: object.prototype.tostring.call

XIOC detected Domain: object.prototype.tostring.call

extracted_from_files

Domain

detected Domain: not.evil.co.uk

XIOC detected Domain: not.evil.co.uk

extracted_from_files

Domain

detected Domain: example.co.uk

XIOC detected Domain: example.co.uk

extracted_from_files

Security Analysis Summary

Security Analysis Overview

Block Site is a Firefox Add-ons extension published by Ray. Version 0.5.7 has been analyzed by the Risky Plugins security platform, receiving a risk score of 49.76/100 (MEDIUM risk) based on 184 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: 67 finding(s)
Medium: 117 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

Block Site is published by Ray on the Firefox Add-ons marketplace. The extension has approximately 73K 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

NET-FETCH-data/blocked/index.js-87

YARA Rule Matches

postinstall file manipulation

postinstall network communication

postinstall persistence mechanism

NoUseWeakRandom

postinstall system command

postinstall file download

postinstall obfuscation

postinstall crypto operations

LocalStorageShouldNotBeUsed

AlertStatementsShouldNotBeUsed

Indicators of Compromise

All Indicators · 116

Security Analysis Summary

Security Analysis Overview

Risk Assessment

Findings Breakdown

What Was Analyzed

Developer Information

Recommendation

Frequently Asked Questions

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