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> Being able to configure multiple VPNs at once, e.g. for Tailscale, ad filtering, blocking HackerNews during times when I should be doing something more productive

AdAway (in F-Droid) can block with /etc/hosts (no VPN involved) if you have root. The hosts blocking still works even when connected to a VPN. Aside from loading ad domain lists into /etc/hosts, it also allows you to specify custom domains to block - I personally have Reddit and HN in there :)

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> Being able to install browser extensions in Vanadium.

You can use IronFox - available in Accrescent store that comes with GrapheneOS, and install firefox extensions

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You can have a second or third VPN active if you use a work profile and private space
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You can use labels for contact scope.
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You might want to read my comment again. :) If you use labels, the app will have full access to the associated contacts, not just to their names & phone numbers.
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So it's not about labels, but you want the ability to restrict the fields an app has access to rather than an all or nothing – full access to a contact or none at all?
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I'm annoyed at everyone who shares my name, phone number and any other details with Meta. I never consented to it. The behavior of their app slurping up your contacts database is despicable.

This doesn't answer your question, but in case it helps for others out there: it's possible to use WhatsApp with no access whatsoever to your contacts and I used it that way for years. Connecting with people is slightly jankier but it still works.

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Note to self: look for second hand unlocked Pixel 10 pro!
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