User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0

Steps to reproduce:

Uncheck the spyware options:

• Allow Firefox to install and run studies
• Allow Firefox to make personalized extension recommendations

Log into your Firefox account on a new device with preferences being synced.

Actual results:

The options were rechecked when using Firefox on a new device, forcing the user to uncheck the invasive options each time.

Expected results:

The options should have remained unchecked as they should be saved and synced.

Sure, we can sync these by default. In the meantime, you can sync them yourself by adding Boolean prefs for services.sync.prefs.sync.app.shield.optoutstudies.enabled and services.sync.prefs.sync.browser.discovery.enabled. To do that, open about:config, copy-paste each one into the search box, then "Add".

(In reply to Lina Cambridge (she/her) [:lina] from comment #1)

open about:config

That is, enter it into the address bar.

copy-paste each one into the search box, then "Add".

In Firefox 67 (the current release), right-click somewhere in the lower pane, choose New, then Boolean. Enter the preference names from comment 1 and set true as their value.

If you don't mind I'd like to test and fix it :)

https://hg.mozilla.org/mozilla-central/rev/781791b985b7