Instead of using the ThreatLocker option 'CreateBrowserWebControlExtensionPolicy' to enable/enforce web control extensions, you can deploy these extensions via Group Policy Objects. For Chrome/Edge, you can deploy registry settings via GPO. For Firefox, you can deploy a single file (policies.json) via GPO.
Please Note: It is important to be sure to include the store link in the registry key 'Value Data'. Be sure to copy/paste the entire Value Data line below for the selected browser store.

Chrome-GPO
Computer Configuration->Preferences->Windows Settings->Registry
Action: Update
Hive: HKEY_LOCAL_MACHINE
Key Path: SOFTWARE\Policies\Google\Chrome\ExtensionInstallForcelist
Value Name: 1
Value Type: REG_SZ
Value Data: hmblejjjbiighoepgehkcallcgiadpmc;https://clients2.google.com/service/update2/crx
(Verify)
chrome://policy
Edge-GPO
Computer Configuration->Preferences->Windows Settings->Registry
Action: Update
Hive: HKEY_LOCAL_MACHINE
Key Path: SOFTWARE\Policies\Microsoft\Edge\ExtensionInstallForcelist
Value Name: 1
Value Type: REG_SZ
Value Data: hgfcoifeokmjbiagpeaicjlhnlpfokfb;https://edge.microsoft.com/extensionwebstorebase/v1/crx
(Verify)
edge://policy
Firefox-GPO
Computer Configuration->Preferences->Windows Settings->Files
Name: policies.json
Action: Update
Source: \\your_domain\SYSVOL\your_domain\firefox\policies.json
Target: c:\Program Files\Mozilla Firefox\distribution\policies.json
Download---> policies.json
(Contents of policies.json)
{
"policies": {
"ExtensionSettings": {
"{6bdd07ae-1b18-4478-8e83-c1d2f0afb94a}": {
"installation_mode": "force_installed",
"install_url": "https://addons.mozilla.org/firefox/downloads/latest/threatlocker-web-control/latest.xpi"
}
}
}
}
(Verify)
about:policies
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