First of all, big thanks to everyone in this thread that provided so much valuable information about this issue! Second, I also managed to reproduce it on the latest Firefox Release 94 on MacOS and also found via mozregression that Bug 1708455 introduced this regression. We indeed fill in the hidden field that was not supposed to be auto-filled. Attached recording of how the issue is reproducible and I also have a profile set up to easily reproduce this easily. Let me know if you need it to investigate this further. Bug 1708455 introduced autofill support for username-only forms, and was just recently enabled in Release 94, as per [Comment 19](https://bugzilla.mozilla.org/show_bug.cgi?id=1708455#c19). Hey Dimi, could you please look into this when you have the time? Thanks!
Bug 1739992 Comment 7 Edit History
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First of all, big thanks to everyone in this thread that provided so much valuable information about this issue! Second, I also managed to reproduce it on the latest Firefox Release 94 on MacOS and also found via mozregression that Bug 1708455 introduced this regression. We indeed fill in the hidden field that was not supposed to be auto-filled. Attached recording of how the issue is reproducible and I also have a profile set up to easily reproduce this. Let me know if you need it to investigate this further. Bug 1708455 introduced autofill support for username-only forms, and was just recently enabled in Release 94, as per [Comment 19](https://bugzilla.mozilla.org/show_bug.cgi?id=1708455#c19). Hey Dimi, could you please look into this when you have the time? Thanks!
First of all, big thanks to everyone in this thread that provided so much valuable information about this issue! Second, I also managed to reproduce it on the latest Firefox Release 94 on MacOS and also found via mozregression that Bug 1708455 introduced this regression. We indeed fill in the hidden field that was not supposed to be auto-filled. Attached recording of how the issue is reproducible and I also have a profile set up to easily reproduce this. Let me know if you need it to investigate this further. Bug 1708455 introduced autofill support for username-only forms as well and was just recently enabled in Release 94, as per [Comment 19](https://bugzilla.mozilla.org/show_bug.cgi?id=1708455#c19). Hey Dimi, could you please look into this when you have the time? Thanks!