Rated 5 out of 5 stars

Life changing add on for people with multiple monitors (Even 1 monitor it comes in handy), can't recommend enough if your the type of person who takes advantage of multiple windows and tabs.

To the developers:
What needs to happen to get this updated to Quantum?
I am perfectly willing to donate to the cause if needed.

I have held off the Firefox 57 upgrade because of lack of compatibility with this add on. I have installed Firefox ERS to give me a little bit more time. But I think support ends a few months for ERS, and I have heard great things about Quantum, but I have yet to use it as my daily driver because of this add on.

Thanks for giving us such a wonderful program.

This user has a previous review of this add-on.