I've lost 3+ years worth of tabs.
Firefox will automatically close immediately after checking for updates for add-ons.
Disabling FVD prevents that from happening.
I am using version 56.
Also please don't respond with;
This is the simples option, not always help but we encourage to try.
If it won't help, let us know.
^ This does not work.
And please don't tell me to install eversync.
Just revert, nothing you did with this update is worth shit to anyone.
Customer support service by UserEcho