Search suggestions disabled despite everything being on
I want to enable search suggestions, thus I enabled it from Settings >> Search >> Provide search suggestions (all 4 boxes are ticked). Furthermore, in about:config, I have the following parameters set to true:
I even downloaded the DDG extension, yet despite all that, nothing gets suggested. Just the history.
This is the case for many search engines I tried (DDG, startpage, Brave, SearXing).
Please let me know what I'm doing wrong, I've tried everything.