Firefox Extensions

Overview

Evidence: Firefox Extensions Description: Collect Firefox Extensions (Addons) Category: Applications Platform: windows Short Name: fext Is Parsed: Yes Sent to Investigation Hub: Yes Collect File(s): No

Background

Firefox extensions (add-ons) enhance browser functionality but can pose significant security risks. Malicious extensions can steal credentials, inject ads, track browsing activity, exfiltrate data, and modify web content. Understanding installed extensions is crucial for detecting browser-based attacks and unauthorized access.

Data Collected

This collector gathers structured data about firefox extensions.

Firefox Extensions Data

Field	Description	Example
ExtensionID	Extension ID	Example value
SyncGUID	Sync GUID	Example value
Version	Version	Example value
Username	Username	Example value
Type	Type	Example value
Name	Name	Example value
Description	Description	Example value
Visible	Visible	true
Active	Active	true
UserDisabled	User Disabled	true
AppDisabled	App Disabled	true
Path	Path	Example value
DefaultLocale	Default Locale	Example value
Hidden	Hidden	true
InstallTelemetryInfo	Install Telemetry Info	Example value
Location	Location	Example value
ManifestVersion	Manifest Version	123
OptionsURL	Options URL	Example value
OptionsType	Options Type	123
SourceURI	Source URI	Example value
SignedState	Signed State	123
Incognito	Incognito	Example value
UserPermissions	User Permissions	Example value
OptionalPermissions	Optional Permissions	Example value
InstallDate	Install Date	2023-10-15 14:30:25+03:00
UpdateDate	Update Date	2023-10-15 14:30:25+03:00
SignedDate	Signed Date	2023-10-15 14:30:25+03:00

Collection Method

This collector parses Firefox extensions.json and addons.json files from user profiles to extract installed extension information including names, IDs, versions, descriptions, permissions, and installation sources.

Forensic Value

Firefox extension data provides insight into potential compromise vectors and data exfiltration paths. Malicious or suspicious extensions may indicate phishing attacks, credential theft, adware infections, or privacy violations. This evidence helps identify attack entry points, persistence mechanisms, and unauthorized browser modifications.