Regression in Firefox 71

A Reviewable post written by Piotr Kaminski.By: Piotr Kaminski
Published: Friday, October 25, 2019

Heads up: Firefox 71 has a regression that causes Reviewable to fail to load diffs with the error TypeError: Argument 1 of FileReaderSync.readAsText is not an object. I filed a bug report but in the meantime you can work around the issue by using an older version of Firefox (or another browser), or by appending ?debug=workers to the Reviewable URL.

Sorry for the trouble! If Mozilla can't get this fixed before FF 71 hits the mainstream I guess I'll have to turn off shared workers for Firefox.