Maybe they use something like https://getemails.com/ ? It works only for emails but basically the same scenario. Source: about 2 years ago

I haven't had exposure to this space since the GDPR went into effect, but it used to be trivially easy to do this. A quick Googling shows there are still providers of this sort of service, such as GetEmails[1] which bills itself as '100% compliant in the US'. [1] https://getemails.com/. - Source: Hacker News / about 3 years ago

Firefox + uBlock Origin on mobile is great but Bromite is the way to go. Faster, more secure and built-in ad-blocking. Source: almost 2 years ago

Why are you using chrome though? Chrome, google app and facebook are literally the biggest trackers you need to block. Try firefox or it's forks (fennec/mull) or bromite. Bromite is based on chromium so it will be an easy switch. I personally use fennec f-droid (a fork of firefox) which is available on f-droid. Source: about 2 years ago

Cookie AutoDelete can be replaced with an always-on incognito mode similar to what Bromite has. Though I can understand keeping this one in as it gives finer control over cookies than incognito mode. Source: over 2 years ago

I don't think you can do that at the moment. Bromite has an import/export bookmarks feature but I don't know if you will be able to import your existing file. Source: almost 3 years ago