Get-FirefoxExtensions

Description

Gather information about extensions installed on the Mozilla Firefox browser for each user.

Requirements

• Run as administrator
• PowerShell v5+
• .NET Runtime 4.5+

Usage

1. Import .NET compression utilities.
2. Get valid user profile paths and perform the following for each path:
   1. Validate if the Firefox Profile path exists.
   2. For each valid Firefox profile folder, locate and extract the XPI files (zipped extension packages) into a temp folder, then run the manifest check.
   3. From each extracted directory, locate the 'manifest.json' file.
   4. Read the manifest.json file to find the name of the extension.
   5. The manifest file either contains the name of the extension or a reference to the variable storing the name in the messages.json file.
   6. If the manifest file returns a variable starting with double underscores (e.g., __MSG_APP_NAME__), then attempt to find the extension's name from the 'en/messages.json' file followed by the 'en_us/messages.json' file.
      • Example: If the name stored in the manifest.json file is __MSG_APP_NAME__, then both messages.json files will be checked for the value stored under the 'APP_NAME' object.

Get the installed extensions for the Mozilla Firefox browser.

.\Get-FirefoxExtensions.ps1

Output

• .\Get-FirefoxExtensions-log.txt
• .\Get-FirefoxExtensions-error.txt

System.Management.Automation.PSCustomObject

Name                    MemberType   Definition
----                    ----------   ----------
Equals                  Method       bool Equals(System.Object obj)
GetHashCode             Method       int GetHashCode()
GetType                 Method       type GetType()
ToString                Method       string ToString()
Browser                 NoteProperty string Browser=Firefox
ExtensionID             NoteProperty System.String ExtensionID={a7fe67a3-d248-48d9-93ce-633fc02cdc98}
ExtensionInstallTimeUtc NoteProperty datetime ExtensionInstallTimeUtc=03/01/2023 16:55:45
ExtensionName           NoteProperty string ExtensionName=The best extension
ExtensionVersion        NoteProperty string ExtensionVersion=1.1.1
UserProfilePath         NoteProperty System.String UserProfilePath=C:\Users\localadmin