Hello,
If you have some issues with restoring a backup, please contact me to my support e-mail.
Currently the backup file contains all settings except the thumbnails (images).
The cloud contains these data as well and when you login on a new PC, it should download it automatically.
There is also a History feature that can help when you lost your local settings (this can happen if you downgrade from Firefox 63 to any previous version).

Best regards,
Juraj Mäsiar

Hello,
This is a Firefox bug I've reported here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1462580
It will be fixed in Firefox 62, scheduled for release in 4 weeks from now.

Best regards,
Juraj Mäsiar

Hello,

The start-up issue is a Firefox bug - due to asynchronous nature of loading add-ons sometimes the first tab is loaded before the add-on is loaded which can result in blank page, wrongly loaded page or default new tab page.

Regarding the local .html files - this is now completely blocked by Firefox internal security for all add-ons. You can create such links in my speed dial, but Firefox won't allow you to click on them.
There was a discussion about this here:
https://discourse.mozilla.org/t/opening-links-to-local-files-file/16449
and some official text here:
https://wiki.mozilla.org/WebExtensions/Filesystem

Situation in Chrome browser is very similar but Chrome added option (checkbox) to enable access to local files for specific add-on on their add-on page.
I hope something similar will come to Firefox one day, but until then, there is nothing I can do about it.

Best regards,
Juraj Mäsiar

Hello,

In urgent cases like this, please contact me to my support e-mail (I'm trying to reply asap).
This issue was caused by a rare Firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1478602
And it should be fixed after upgrading to the current version 10.0.
Also your dials are not lost, only thumbnails are not visible.
And to prevent loosing your dials, make sure to either create a manual backup in the Options page or by creating free cloud account.

If the problem does not disappear after upgrading to version 10.0, please write me!

Best regards,
Juraj Mäsiar

Hello,
There is a rare Firefox bug that should get fixed after upgrading to the current version 10.0.
If the problem does not disappear after upgrading to version 10.0, please contact me to my support e-mail.

Best regards,
Juraj Mäsiar

Hello,

I've just released new version 9.8 that contains many changes to auto-reload that could fix these issues.
Since Firefox 61, the special config is no longer needed and the tab will be hidden automatically (it will be in the list of hidden tabs).

Regarding that tab - it's used to create thumbnails if you setup Auto-reload and it's used for background reload (which will be soon the default thumbnail generation method). That tab is being opened and closed depending on your setup - by default it will reload up-to 4 dials at a time and then it gets closed. You can alter this behavior in Options page - you can check the "Keep reloading tab opened after reloading" or change "Maximum concurrently loading pages" to much more than 4 if you have many dials scheduled to be reloaded.

Anyway if you have still issues with current 9.8 version, please let me know to my support e-mail!
Thank you for reporting bugs!

Best regards,
Juraj Mäsiar

Hello,
Please try to upgrade to version 10.0 that fix some rare issues.
If the problem does not disappear after upgrading to version 10.0, please contact me to my support e-mail.

Best regards,
Juraj Mäsiar

Hello,

Opera still didn't approved my add-on a year ago when I submitted it for the first time. I think I will need to write them personally.
Also there is now one issue in Chrome based browsers (including Opera) that should be fixed in 4 weeks. Once it's fixed, I will proceed with this.

Until then, you can use the cloud dials page even in Opera (however it's not editable so it's just partial workaround).

Best regards,
Juraj Mäsiar