stylo_arc is used at run time in 5 crates (of which 1 optionally).

Depender (with downloads and own rev deps) stylo_arc version
370 3 stylo_selectors ^0.4
360 2 stylo_malloc_size_of ^0.4
350 1 stylo_traits ^0.4
350 stylo ^0.4
370 3 stylo_to_shmem optional ^0.4.0