We launched update couple hours ago. Update extension to the latest version: 62.6.7
https://addons.mozilla.org/en-US/firefox/addon/fvd-speed-dial/

Roll back the old folder - rename it back. 

Just update the extension.
https://addons.mozilla.org/en-US/firefox/addon/fvd-speed-dial/

Once we finish fixing major problems, we will launch a new update. Most likely you will have the same problem again.
You will need to do following:
Option #2 or #3
https://everhelper.me/help1.php

Unfortunately, you can't keep older version for a long because new FF57+ will automatically disable it. There is nothing we can do, that's how Firefox team implemented. 
We try to fix everything that is possible.

Highly recommend using EverSync to backup your dails.
https://addons.mozilla.org/en-US/firefox/addon/fvd-synchronizer

Thank you.

Firefox doesn't provide developers such support for now, waiting when they do that.

Right Click in speed dial on free space. There will be additional settings.

Hello

Can you send screenshot of this page - chrome-extension://llaficoajjainaijghjlofdfmbjpebpa/options.html ?

Hi,

Thank you for your feedback. I will forward to dev. team.

Hi,

We launched update couple hours ago. Update extension to the latest version: 62.6.7
https://addons.mozilla.org/en-US/firefox/addon/fvd-speed-dial/

This is the simples option, not always help but we encourage to try. 

- Copy and paste in address bar about:support  
- Select following http://nimb.ws/Vm5pjy 
- Rename this folder to any name and restart Firefox http://nimb.ws/awxfuW BUT don't delete it. Just rename it, for example Storage_OLD

Here is VIDEO
http://nimb.ws/XrkKQ2

If it won't help, let us know.

Those speed dials are custom images, images from gallery or auto-screenshots of web pages?

Hi,

We launched update couple hours ago. Update extension to the latest version: 62.6.7
https://addons.mozilla.org/en-US/firefox/addon/fvd-speed-dial/

This is the simples option, not always help but we encourage to try. 

- Copy and paste in address bar about:support  
- Select following http://nimb.ws/Vm5pjy 
- Rename this folder to any name and restart Firefox http://nimb.ws/awxfuW BUT don't delete it. Just rename it, for example Storage_OLD

Here is VIDEO
http://nimb.ws/XrkKQ2

If it won't help, let us know.

Will be fixed soon.