Seeing as how the internet is actually a shitload of poorly organized data it's unclear what advantage Mozilla gains by not being in the 'data collection business'.
"Firefox isn’t perfect — it still defaults searches to Google and permits some other tracking. But it doesn’t share browsing data with Mozilla, which isn’t in the data-collection business."
Needlessly relearning things to avoid collecting them doesn't make any part of browsing faster or more efficient.