Issue with DuckDuckGo being the only option in the search engine dropdown list

[ 🟩] I have read the troubleshooting guide, done the checks and confirmed this is caused by arkenfox
- unchecked issues ~~may~~ will be closed as invalid

🟪 REQUIRED INFO

Browser version & OS: Windows 10 & Firefox Browser 125.0.1 (64-bit)
Steps to Reproduce (STR): Drag updater.bat, pref.js, user.js, and user.js-override into Firefox's profile. Within user.js-override, I added, "user_pref("keyword.enabled", true)";. Run the updater.bat. Go check the dropdown menu for browser options located within Settings->Search.
Expected result: All normal search engines to be located within the dropdown (DuckDuckGo, Google, etc)
Actual result: Only DuckDuckGo being the option
Console errors and warnings:
Anything else you deem worth mentioning: I'm not sure if I'm providing the correct override statement to get the search engines back in the dropdown, but I have searched through all the closed issues with no avail.

arkenfox / user.js