Performance of fetch call to POST /api/annotations is very slow on firefox #18
Description
On the python side, it's very fast.
In Chrome, it's fast-ish.
In Firefox, it's very slow, and I have no idea why. JSON serializing is fast, the response comes from the backend quickly, and JSON decoding is fast, but there's something slow going on between the response coming back and the decoding. I think maybe it has to do with https? I don't know enough to say either way.