> I just started a two fresh profiles to test your claim (one in Firefox, one in Dev Edition), the opt-out for telemetry is present in the very first dialogue box and costs 2 clicks.

And now I'm confused. Firefox 153 on Linux, new profile.

First screen:

> You’re in safe paws

> We protect your data and block companies from spying on your clicks — automatically.

> Set Firefox as default browser

> Import from previous browser

Second screen:

> Give your browsing a boost

> Extensions are tiny apps that let you customize Firefox. They can power up your privacy, enhance productivity, change the way Firefox looks, and so much more.

> Explore staff recommended extensions

Third screen:

> Go anywhere. Sync everything.

> Grab bookmarks, passwords, and more everywhere you’re signed in to Firefox. Plus, your data is encrypted so only you can see it.

> Sign up or sign in

And that's it; after that it dumps out to the page of ads that is the new tab screen. If I click to Settings > Permissions and data > Firefox data collection and use, it appears that everything is default enabled except automatically sending crash reports.