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Yes, ironfox is good too (i forgot to mention it) but on grapheneos you will want to end up using their browser

Avoid Gecko-based browsers like Firefox as they’re currently much more vulnerable to exploitation and inherently add a huge amount of attack surface. Gecko doesn’t have a WebView implementation (GeckoView is not a WebView implementation), so it has to be used alongside the Chromium-based WebView rather than instead of Chromium, which means having the remote attack surface of two separate browser engines instead of only one. Firefox / Gecko also bypass or cripple a fair bit of the upstream and GrapheneOS hardening work for apps. Worst of all, Firefox does not have internal sandboxing on Android. This is despite the fact that Chromium semantic sandbox layer on Android is implemented via the OS isolatedProcess feature, which is a very easy to use boolean property for app service processes to provide strong isolation with only the ability to communicate with the app running them via the standard service API. Even in the desktop version, Firefox’s sandbox is still substantially weaker (especially on Linux) and lacks full support for isolating sites from each other rather than only containing content as a whole. The sandbox has been gradually improving on the desktop but it isn’t happening for their Android browser yet.

Also, having exodus integration in app downloader is good but not worth it for exchange of no signature verification, so it’s better to just check it in browser instead or use their app to check trackers

On grapheneos you should be using vanadium since its most secure browser on phone. On other android devices, use brave instead. Also if family and friends dont want to use signal but want to use whatsapp then uninstall whatsapp, one way or another they would have to either end up using sms or other form of contact

Some apps that you use are not safe. Aurora store doesnt send too much data to google but it doesnt verify app signatures which can lead to installing malicious apps, use normal play store instead which verifies app signatures (its also suggested to use by grapheneos devs). Whatsapp, collects data about you. Cromite, uses adblock plus which is really bad. Also here is another reason why cromite is bad:

“Cromite has very problematic changes included which substantially reduce privacy and security. It reduces security more than it improves it. For example, it includes the highly problematic Eyeo filtering engine from the company behind Acceptable Ads, Adblock Plus, etc. which took over the forked uBlock extension misleading people with the name pretending to be the uBlock Origin project among other extensions. Eyeo’s C++ code is low quality and has memory corruption issues… Cromite including the incredibly sketchy Eyeo content filtering engine and stuff like additional codecs goes against what we’re trying to achieve. We also don’t think the randomization-based anti-fingerprinting approach works, among other issues”.