Web Browsers
Even if you don't pick one of the recommendations in this article, please don't use a closed-source web browser. Google Chrome, Edge, Opera, etc. are all just phoning home with every URL you visit and likely much worse.
LibreWolf
Just use LibreWolf. It's Firefox with all the bloat removed and uBlock Origin pre-installed.
Ungoogled Chromium
If you really want the same engine as Chrome/Chromium but without all the spyware stripped out, this is a good option.
https://github.com/ungoogled-software/ungoogled-chromium
Bromite (Android)
Phones are cringe and you're fighting a losing battle if you're trying to avoid surveillance while carrying one everywhere. That said, this is basically the equivalent of Ungoogled Chromium for Android.
https://github.com/bromite/bromite