When i clicking the download button all my bookmarks are deleted on the Firefox!!!
And did not come back bookmarks even after system restore..
So i deleted this addon, i want you to delete my registration absolutely and importantly for security reasons OK?

The worst bookmark manager ever! You will end up with duplicate bookmarks and empty folders. HIGHLY UNRELIABLE!

It's a nightmare, if you keep chrome/firefox bookmark sync on, this addon will keep duplicating your bookmarks. What's worse is sometimes it's duplicating folders but not bookmarks inside, which may cause the bookmarks lost

Not always works. Synch one time, then stops for a couple of months, and back again. The options to backup, import or export, doesn´t show up. EVER. It was a great plugin, not anymore.
Switching to another service. Testing xBrowserSync right now

Love EverHelper! It always helps me to retrieve my lost dials on FVD!