It has a reasonable default of reliable privacy frontends but I may add an onboarding step(already in firefox due to more restrictions in their manifest v3 than chrome) for selecting sites

No, yes, It depends- for my simple use case of redirecting embeds and links, it is probably faster by using declarativenetapi instead of heavier webrequestblocking api

Libredirect is a manifest v2 extension (can’t be published on chrome store) and has permissions for all_urls, predirect is a manifest v3 extension and only has permissions for necessary domains