Addon version: 62.4.8
Browser: Firefox 56.0
OS: Windows 7 Pro 64 bit
As other people have noted the issue with the invisible popup is a severe one, it's even interfering with my typing of this bug report, as it steals focus while I'm typing.
This is making the FVD Speed Dial essentially unusable unless I disable the auto update of the dials which is one of the addon's best features.
Other than the focus stealing problem I've notice a couple of other issues.
1. When starting up Firefox it takes a lot longer to display the dials (several seconds longer than with the previous version).
2. Occasionally when opening a new tab the background is displayed as white instead of the background image I used.
For now I'll just have to get by without the auto update of dials, but I'm hoping that issue is fixed quickly in a new version.
Customer support service by UserEcho
I sent feedback to dev.team.
2. Occasionally when opening a new tab the background is displayed as white instead of the background image I used - Can you record screencast?
It's only occurred once in the last few hours that I've been using it, so it would be difficult to catch it.