[Affected versions]: Nightly 57.0a1 [Affected platforms]: Windows 7 x32 [Steps to reproduce]: 1. Open Firefox [Expected result]: The toolbar should have 40px. [Actual result]: The toolbar has 32px.
I think it was something related to the profile, with a new profile I can't reproduce it, unfortunately, I don't have the old profile anymore. We will pay attention to this and if we will encounter it in the future we will reopen the bug. I will mark this as resolved invalid.