Tabs lost--anyone able to migrate from Firefox's vertical tabs back to Sidebery?

[rieje]

I tried Firefox's vertical tabs on the latest Firefox version with "sidebar.verticalTabs", true, found I did not like them. When I disable and restart Firefox, Firefox/Sidebery shows only about a dozen of my tabs. Luckily I have a habit of backing up sessionstore.jsonlz4 containing the list of tabs/session.

Anyone have this problem?

[soul4kills]

It happens, but rarely. It's a firefox problem with session corruption, usually due to a crash. Sidebery has "Snapshots". You should consider using it. It allows you to periodically auto save all your tabs. No need to backup sessionstore manually.