Hint to enable "Show your windows and tabs from last time"

[hupf]

Firefox is way faster to load the already open tabs, compared to when Tabmarks is opening them. Show a notification to the user, that he should enable tab restoring from last session.

Test if it works with not opening the group's tabs in this case.

[hupf]

Alternatively add option:

• Force-load tabs of selected group on start-up
• Select group put don't load any tabs (let FF do this)