I use chromium (even though I wish they had a more colorful icon). :lipsrsealed:
As for a search engine, I use Google most frequently (dum...dum...dum..)

The results it provides are superior to all the others I have tried... I search for a lot of "needles in haystacks" and I need to use multiple languages (when google fails to turn up information, I go to national search platforms/tools when searching in German and Russian).
I figure most of the marketing geniuses who would use/steal my search data would find very little useful. When I worry about 'safety', there is always
Tor