[ Not Working ] accounts.firefox.com

Hey E29037CB! I was able to replicate the behavior you've described on accounts.firefox.com and have reported the issue to our developers. Hopefully there will be a fix for this in the future.

For now, I recommend copying/pasting or clicking/dragging your username to the field. This can be done via the extension or the app.

I hope this can help until there is a better solution. I'm very sorry for the inconvenience. If you have any other questions, please let us know.

ref: dev/core/core#15516