have you tried clearing cookies?

I'm using iron Fox and ddg search is ok. I can recommend it. It's supposed to have the yucky stuff removed.

I also use ddg but im pretty sure they sell your data to microsoft. Also firefox has been under fire for privacy complaints and censorship. If privacy is a concern you might aswell find another solution.

If you just want it to work Id try waterfox (what i use), or some other fork of firefox that focuses on privacy, ive also heard good things about ungoogled chromium.

Hope that helps

Works fine for me, Firefox 138.0.3 (Build #2016090503). What happens when you try in chrome?