Anyhow, for me it doesn't matter. Firefox is open in concept only, it's controlled by a weird NGO. I've switched to Vivaldi which is controlled by a company that only cares about doing a browser, nothing else. It's also got an open-source core, all the front-end code is visible even if it's not officially 100% open source (Firefox has closed source backend bits anyway). Also based in Europe, which matters a lot to me currently due to world politics.