STR: on today's m-c and gaia, on a hamachi, 1. start fxa test app flow 2. enter an existing account email 3. enter the wrong password 4. you'll see an error overlay with an 'OK' button and a horizontal line, but no text I guess something's up with the way the system app is filling in the error text, I will investigate unless someone steals this.

I think there might be more to it than this, working on STR

This is definitely a legit bug. I can still repro on today's m-c. The obvious problem is that the error overlay isn't being displayed with error text. That's covered by this bug. The more important problem, I think, is that the system app doesn't do a quick getAccounts() to check if we have a session already. If we do, it should show the success screen, which varies depending on whether the account is verified or unverified. I've opened 964417 to track this deeper bug. STR: 1. Sign into FxA on device via fxa test app 2. Go through the signup flow, should work fine 3. Reopen the fxa flow 4. Sign in with the same account 5. After entering password, you're shown a panel with no error message.

This is a dup of bug 960130. The reason of this blank screen is the absence of l10n keys removed in bug 961009