URLCheck could be what you’re looking for.

It acts as the default browser but then pops up a window to ask you where to open the link, does it every time. I thought I would be bothered by that part but it’s so much better. You get to choose to open in Firefox private mode even in the in app browser. Links here on lemmy open through Sync (and Connect if I’m not mistaken) open in app on Firefox private mode.

You can also remove trackers from URLs, choose the default app per domain, love it

Always liked this because it helps people see to some extent where money is going.

I know the UK and Portugal do this as well. It was especially interesting in the UK during the Brexit years because you could see a tiny piece of that pie chart with EU contributions, almost saying “this is how little of our money is going to Europe”, didn’t do any good in the end but hey, still great info to have that all detailed