Edit: I am using Onetab on all my browsers on this computer, Chrome, Firefox Nightly, Firefox Developer edition and this browser, Regular Firfox 70.0.1 (64-bit) on Ubuntu 18.04 and they all work Great. This is a Wonderful extension!
______One Year ago: _____
One of the most useful addons EVER !
If I am not finished working I can save all my tabs until tomorrow etc.