"Remember, you can always opt out of sending any technical or usage data to Firefox. Here’s a step-by-step guide [0] on how to adjust your settings."
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1. Click the [hamburger menu button] and select Settings.
2. Select the Privacy & Security panel.
3. Scroll down to the Firefox Data Collection and Use section.
4. Check or uncheck the box next to Allow Firefox to send technical and interaction data to Mozilla.
[0] https://support.mozilla.org/en-US/kb/share-data-mozilla-help...