Is "Multithreaded Download Manager" on Firefox Add-ons Safe to Install?
This extension can download files with multiple connections to the server. Depending on the network condition, this may increase the download speed. First steps: If more than 6 threads are needed, open about:config, and increase the values of "network.http.max-persistent-connections-per-server" and "network.http.max-persistent-connections-per-proxy". Make sure there is enough disk space. The files need to be first downloaded to Firefox's internal storage. This extension does not collect or upload your data. The required permissions are explained in Privacy and Permissions .
Risk Assessment
Analyzed330 security findings detected across all analyzers
Firefox extension requesting 13 permissions
Severity Breakdown
Finding Categories
YARA Rules Matched
10 rules(165 hits)Requested Permissions
13 permissionsAccess and modify data on every website you visit
Manage, modify, and monitor downloads
Intercept, modify, and block all network requests
Block network requests before they complete
Read data from your clipboard
About This Extension
Detailed Findings
171 totalYARA Rule Matches
10 rulesIndicators of Compromise
Network indicators, suspicious strings, and potential IoCs extracted during analysis
All Indicators · 153
detected URL: https://openclipart.org/detail/211717/matticonsemblemdownloads) XIOC detected URL: https://openclipart.org/detail/211717/matticonsemblemdownloads)
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detected Domain: this.file.read XIOC detected Domain: this.file.read
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detected Domain: xiph.org XIOC detected Domain: xiph.org
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detected Domain: new.target.name XIOC detected Domain: new.target.name
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detected URL: http://openclipart.org/ XIOC detected URL: http://openclipart.org/
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detected URL: https://openclipart.org/detail/30673/tango-blue-go-down-by-warszawianka XIOC detected URL: https://openclipart.org/detail/30673/tango-blue-go-down-by-warszawianka
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detected URL: http://creativecommons.org/ns#Reproduction XIOC detected URL: http://creativecommons.org/ns#Reproduction
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detected URL: http://creativecommons.org/ns#Distribution XIOC detected URL: http://creativecommons.org/ns#Distribution
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detected URL: https://openclipart.org/detail/30673/tango-blue-go-down) XIOC detected URL: https://openclipart.org/detail/30673/tango-blue-go-down)
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detected URL: https://github.com/asmcrypto/asmcrypto.js) XIOC detected URL: https://github.com/asmcrypto/asmcrypto.js)
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detected URL: http://www.w3.org/2000/svg XIOC detected URL: http://www.w3.org/2000/svg
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detected URL: http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd XIOC detected URL: http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd
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detected URL: http://creativecommons.org/ns# XIOC detected URL: http://creativecommons.org/ns#
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detected URL: http://www.w3.org/1999/xlink XIOC detected URL: http://www.w3.org/1999/xlink
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detected URL: http://purl.org/dc/elements/1.1/ XIOC detected URL: http://purl.org/dc/elements/1.1/
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detected URL: http://sozi.baierouge.fr XIOC detected URL: http://sozi.baierouge.fr
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detected URL: http://exemplo.com/?filename= XIOC detected URL: http://exemplo.com/?filename=
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detected URL: http://example.com/?filename= XIOC detected URL: http://example.com/?filename=
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detected URL: https://drive.google.com/file/d/$ XIOC detected URL: https://drive.google.com/file/d/$
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detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Filename-template XIOC detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Filename-template
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detected URL: http://www.inkscape.org/) XIOC detected URL: http://www.inkscape.org/)
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detected URL: http://www.inkscape.org/namespaces/inkscape XIOC detected URL: http://www.inkscape.org/namespaces/inkscape
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detected Domain: handler.constructor.name XIOC detected Domain: handler.constructor.name
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detected Domain: message.name XIOC detected Domain: message.name
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detected Domain: e.name XIOC detected Domain: e.name
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detected URL: http://addons.mozilla.org/ca/crl.pem0N XIOC detected URL: http://addons.mozilla.org/ca/crl.pem0N
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detected Domain: o.name XIOC detected Domain: o.name
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detected Domain: error.constructor.name XIOC detected Domain: error.constructor.name
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detected Domain: indexeddb.open XIOC detected Domain: indexeddb.open
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detected Domain: this.mutablefile.open XIOC detected Domain: this.mutablefile.open
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detected Domain: this.open XIOC detected Domain: this.open
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detected Domain: this.read XIOC detected Domain: this.read
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detected Domain: this.mutablefile.name XIOC detected Domain: this.mutablefile.name
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detected Domain: this.dataset.id XIOC detected Domain: this.dataset.id
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detected Domain: v.dataset.id XIOC detected Domain: v.dataset.id
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detected Domain: v.name XIOC detected Domain: v.name
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detected Domain: item.name XIOC detected Domain: item.name
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detected Domain: port.name XIOC detected Domain: port.name
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detected URL: http://purl.org/dc/dcmitype/StillImage XIOC detected URL: http://purl.org/dc/dcmitype/StillImage
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detected URL: http://creativecommons.org/licenses/publicdomain/ XIOC detected URL: http://creativecommons.org/licenses/publicdomain/
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detected Domain: commons.wikimedia.org XIOC detected Domain: commons.wikimedia.org
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detected Domain: design.firefox.com XIOC detected Domain: design.firefox.com
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detected Domain: sha1.name XIOC detected Domain: sha1.name
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detected Domain: sha256.name XIOC detected Domain: sha256.name
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detected Domain: sha512.name XIOC detected Domain: sha512.name
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detected Domain: downloads.open XIOC detected Domain: downloads.open
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detected Domain: savebutton.click XIOC detected Domain: savebutton.click
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detected Domain: creativecommons.org XIOC detected Domain: creativecommons.org
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detected Domain: purl.org XIOC detected Domain: purl.org
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detected Domain: openclipart.org XIOC detected Domain: openclipart.org
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detected Domain: sozi.baierouge.fr XIOC detected Domain: sozi.baierouge.fr
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detected Domain: freedesktop.org XIOC detected Domain: freedesktop.org
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detected Domain: mozilla.org XIOC detected Domain: mozilla.org
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detected Domain: freesound.org XIOC detected Domain: freesound.org
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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#
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detected Domain: items.map XIOC detected Domain: items.map
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detected Domain: browser.downloads.search XIOC detected Domain: browser.downloads.search
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detected Domain: www.inkscape.org XIOC detected Domain: www.inkscape.org
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detected Domain: www.w3.org XIOC detected Domain: www.w3.org
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detected Domain: sodipodi.sourceforge.net XIOC detected Domain: sodipodi.sourceforge.net
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detected Domain: tab.id XIOC detected Domain: tab.id
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detected Domain: location.search XIOC detected Domain: location.search
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detected Domain: task-form.no XIOC detected Domain: task-form.no
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detected Domain: networkoptions.open XIOC detected Domain: networkoptions.open
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detected Domain: submitbutton.click XIOC detected Domain: submitbutton.click
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detected Domain: datalist.map XIOC detected Domain: datalist.map
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detected Domain: suffixes.map XIOC detected Domain: suffixes.map
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detected Domain: element.select XIOC detected Domain: element.select
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detected Domain: event.data XIOC detected Domain: event.data
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detected Domain: location.host XIOC detected Domain: location.host
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detected Domain: element.click XIOC detected Domain: element.click
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detected Domain: v.download XIOC detected Domain: v.download
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detected Domain: v.data XIOC detected Domain: v.data
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detected Domain: github.com XIOC detected Domain: github.com
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detected Domain: drive.google.com XIOC detected Domain: drive.google.com
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detected Domain: googleusercontent.com XIOC detected Domain: googleusercontent.com
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detected Domain: browser.runtime.id XIOC detected Domain: browser.runtime.id
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detected Domain: t.name XIOC detected Domain: t.name
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detected Domain: task.id XIOC detected Domain: task.id
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detected Domain: this.list.map XIOC detected Domain: this.list.map
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detected Domain: event.target XIOC detected Domain: event.target
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detected Domain: v1.id XIOC detected Domain: v1.id
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detected Domain: this.next XIOC detected Domain: this.next
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detected Domain: prev.next XIOC detected Domain: prev.next
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detected Domain: centerat.top XIOC detected Domain: centerat.top
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detected Domain: ui.page XIOC detected Domain: ui.page
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detected Domain: background.page XIOC detected Domain: background.page
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detected Domain: localsettings.data XIOC detected Domain: localsettings.data
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detected Domain: connection.read XIOC detected Domain: connection.read
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detected Domain: connection.info XIOC detected Domain: connection.info
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detected Domain: divisibles.map XIOC detected Domain: divisibles.map
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detected Domain: browser.downloads.download XIOC detected Domain: browser.downloads.download
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detected Domain: chunks.map XIOC detected Domain: chunks.map
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detected Domain: multithreadedtask.name XIOC detected Domain: multithreadedtask.name
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detected Domain: v0.id XIOC detected Domain: v0.id
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detected Domain: this.name XIOC detected Domain: this.name
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detected Domain: this.fail XIOC detected Domain: this.fail
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detected Domain: chunk.next XIOC detected Domain: chunk.next
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detected Domain: this.connectionclass.name XIOC detected Domain: this.connectionclass.name
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detected Domain: this.chunkstorageclass.name XIOC detected Domain: this.chunkstorageclass.name
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detected Domain: conn.info XIOC detected Domain: conn.info
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detected Domain: m.no XIOC detected Domain: m.no
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detected Domain: wakelockaudio.play XIOC detected Domain: wakelockaudio.play
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detected Domain: download.id XIOC detected Domain: download.id
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detected Domain: result.map XIOC detected Domain: result.map
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detected Domain: e.target XIOC detected Domain: e.target
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detected Domain: browser.windows XIOC detected Domain: browser.windows
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detected Domain: connections.map XIOC detected Domain: connections.map
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detected Domain: this.reader.read XIOC detected Domain: this.reader.read
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detected Domain: this.data XIOC detected Domain: this.data
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detected Domain: localsettings.post XIOC detected Domain: localsettings.post
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detected Domain: navigator.storage XIOC detected Domain: navigator.storage
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detected Domain: browser.sidebaraction.open XIOC detected Domain: browser.sidebaraction.open
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detected Domain: taskactions.map XIOC detected Domain: taskactions.map
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detected Domain: v.id XIOC detected Domain: v.id
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detected Domain: loglevels.map XIOC detected Domain: loglevels.map
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detected Domain: docs.googleusercontent.com XIOC detected Domain: docs.googleusercontent.com
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detected Domain: this.storage XIOC detected Domain: this.storage
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detected Domain: this.parent.id XIOC detected Domain: this.parent.id
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detected Domain: performance.now XIOC detected Domain: performance.now
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detected Domain: this.info XIOC detected Domain: this.info
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detected Domain: error.name XIOC detected Domain: error.name
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detected Domain: addons.mozilla.org XIOC detected Domain: addons.mozilla.org
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detected Domain: content-signature.mozilla.org XIOC detected Domain: content-signature.mozilla.org
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detected Domain: t296f90a06d35fbafebbbbba3604eb65e.9aff55884b4a42e2b1ecf398aa38ad49.addons.mozilla.org XIOC detected Domain: t296f90a06d35fbafebbbbba3604eb65e.9aff55884b4a42e2b1ecf398aa38ad49.addons.mozilla.org
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detected Domain: example.com XIOC detected Domain: example.com
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detected Domain: exemplo.com XIOC detected Domain: exemplo.com
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detected Domain: task.data XIOC detected Domain: task.data
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detected Domain: this.id XIOC detected Domain: this.id
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detected IP: 2.7.7.4 XIOC detected IP: 2.7.7.4
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detected IP: 1.4.4.4 XIOC detected IP: 1.4.4.4
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detected IP: 6.65.33.31 XIOC detected IP: 6.65.33.31
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detected IP: 1.36.68.68 XIOC detected IP: 1.36.68.68
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detected IP: 2.4.8.7 XIOC detected IP: 2.4.8.7
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detected Domain: signingca1.addons.mozilla.org XIOC detected Domain: signingca1.addons.mozilla.org
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detected Domain: mozilla.com XIOC detected Domain: mozilla.com
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detected URL: http://mozilla.org/MPL/2.0/. XIOC detected URL: http://mozilla.org/MPL/2.0/.
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detected URL: https://creativecommons.org/publicdomain/zero/1.0/) XIOC detected URL: https://creativecommons.org/publicdomain/zero/1.0/)
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detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Important-changes-for-Firefox-75 XIOC detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Important-changes-for-Firefox-75
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detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Custom-CSS-snippets XIOC detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Custom-CSS-snippets
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detected URL: http://design.firefox.com/icons/viewer/) XIOC detected URL: http://design.firefox.com/icons/viewer/)
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detected URL: https://commons.wikimedia.org/wiki/File:Silence.ogg) XIOC detected URL: https://commons.wikimedia.org/wiki/File:Silence.ogg)
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detected URL: https://freesound.org/people/JustVic/sounds/430800/) XIOC detected URL: https://freesound.org/people/JustVic/sounds/430800/)
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detected URL: https://openclipart.org/detail/212029/rodentiaiconsemblemdownloads) XIOC detected URL: https://openclipart.org/detail/212029/rodentiaiconsemblemdownloads)
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detected URL: https://openclipart.org/detail/293373/up) XIOC detected URL: https://openclipart.org/detail/293373/up)
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detected MD5 Hash: 9aff55884b4a42e2b1ecf398aa38ad49 XIOC detected MD5 Hash: 9aff55884b4a42e2b1ecf398aa38ad49
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detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Connection-API XIOC detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Connection-API
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detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/About-%22Cannot-access-internal-storage%22 XIOC detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/About-%22Cannot-access-internal-storage%22
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detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Quick-actions-for-built-in-download-in-automatic-prompt XIOC detected URL: https://github.com/jingyu9575/multithreaded-download-manager/wiki/Quick-actions-for-built-in-download-in-automatic-prompt
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detected IP: :: XIOC detected IP: ::
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detected Domain: url.search XIOC detected Domain: url.search
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detected Domain: mutablefilechunkstorage.storage XIOC detected Domain: mutablefilechunkstorage.storage
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detected URL: http://creativecommons.org/ns#DerivativeWorks XIOC detected URL: http://creativecommons.org/ns#DerivativeWorks
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Security Analysis Summary
Security Analysis Overview
Multithreaded Download Manager is a Firefox Add-ons extension published by jingyu9575. Version 3.2b8 has been analyzed by the Risky Plugins security platform, receiving a risk score of 67.03/100 (HIGH risk) based on 330 security findings.
Risk Assessment
This extension presents high security risk. Significant concerns were identified during analysis. It is not recommended for use in sensitive or production environments without thorough review.
Findings Breakdown
- High: 165 finding(s)
- Medium: 165 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
Multithreaded Download Manager is published by jingyu9575 on the Firefox Add-ons marketplace. The extension has approximately 6K users.
Recommendation
This extension is not recommended for installation without thorough manual review. Consider alternatives with lower risk scores, or contact the developer to address the identified security concerns.
Source Code Not Available
Source code is not available for this version of the extension.
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