Each time i start to open Firefox , all my tabs are blank ( empty ) ,
EACH time i need to apply a backup , all days every days ...
It's boring and i don't undertand WHY all my tabs are empty ?
it was running clean last year.
What i have done to fix :
HELP please !
Regards,
Steve
Hi! Do you have enabled this option?

Ho , it's the first thing i have checked ;)
What is your OS and version of the addon?
Checked on the latest version of the addon? (v4.4.2.4)
All my tabs groups are ok ,
i know i have more 400 bookmark in 15 tabs ( maybe need to remove some tabs ?)
i have reinstall yesterday the latest version of your plugin ;)
Version 4.4.2.1
OS : windows 10 ( clean install )
Firefox Dev
I do not quite understand your last message.

It's maybe better to understand ? :P
(I have edit my latest comment)
Such a question: if you disable the add-on and restart the browser, will the open tabs (in the screenshot) remain in the window?
If the tabs are not restored when the browser starts and with the add-on disabled, I can advise you to create a new FF profile and transfer all your bookmarks, tabs, passwords, etc. to it. Apparently your profile has been damaged.
I had an issue like this when using STG with another addon. Removing the offending addon fixed my issue.
@gorbachev you have right !
After disable some plugins, seem to be runing well ;) !
i really don't know which plugin was bad, i keep checking if i find the guilty plugin.
@Drive4ik , Thank for this amazing plugin!
@Erreur32 and @gorbachev , guys, please tell me what conflicted addon you are disable?
It is very important for me to know this. I am making a list of conflicting addons to notify the user if he has one of the addons from this blacklist
I believe it was Tab Session Manager:
https://addons.mozilla.org/en-US/firefox/addon/tab-session-manager/
It could've been another session manager type addon as well, it's been a while and I'm not using it any longer, obviously, but I'm pretty sure it's this one.
I have also disable this useless extension too: Tab Session Manager.
and i can confirm it's look fine now since my last issue.
Then I close the ticket. Thank you all for finding the cause of the problem.
Most helpful comment
@Erreur32 and @gorbachev , guys, please tell me what conflicted addon you are disable?
It is very important for me to know this. I am making a list of conflicting addons to notify the user if he has one of the addons from this blacklist