We got many error reports, rolled back to the previous version. Just reinstall 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  #1 #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.

Если не помогло, то на данный момент сценарий такой:
- Мы получили много фидбека, сейчас активно правим все возможные ошибки. Временно откатили версию обратно.
Вам нужно будет переустновить аддон.
https://addons.mozilla.org/en-US/firefox/addon/fvd-speed-dial/

Но когда мы запустим новый апдейт, у вас скорее всего будет таже проблема, и вам нужно будет делать:
вариант 2 или 3 
https://everhelper.me/help1-ru.php 

Если не обновиться до новой версии, то ФФ 57+ автоматически заблокирует старый аддон. К сожалению, так сделали разработчики ФФ браузера.

Очень рекомендуем делать бекап через Еверсинк чтобы всегда можно было восстановить ваши закладки
https://addons.mozilla.org/en-US/firefox/addon/fvd-synchronizer

Hi,

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. 

If it won't help, let us know.

Hi,

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. 

If it won't help, let us know.

Hi,

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. 

If it won't help, let us know.

Да, надо ждать нового апдейта. 

Вприцнипе перенести данные на новый профаил достаточно быстро. В гугле можно найти программы которые все бакапаюти восстанавливают.

Еверсинк - поможет перенести букмарки и дилы.

Ситуация не приятная, но Мозилла по сути всех разработчиков поставили перед фактом и выпустили не до конца работающий ФФ.

Hi,

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. 

If it won't help, let us know.

Hi,

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. 

If it won't help, let us know.

Hi,

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. 

If it won't help, let us know.

We got many error reports, rolled back to the previous version. Just reinstall 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.