Variants:
conventional UI thread:
(
32-bit,
64-bit),
conventional worker:
(
32-bit,
64-bit),
ESM in UI thread:
(
32-bit,
64-bit),
ESM worker:
(
32-bit
64-bit)
Testers beware: the UI-thread tests may all
run concurrently except that they may fail kvvfs tests because
of concurrent access to that storage (it's so rare that it's
never been seen in practice because those tests are so fast,
but is hypothetically possible). The Worker-thread
tests run OPFS tests, which are slow in some browsers
and will fail if two instances of this page run them at the
same time.