SQ looks to be very fully featured (I haven't explored it in depth yet) and probably very much up to the task BUT it has for me one big negative. SQ does not uninstall. Install it and it seems you are stuck with it.
I've been thru the uninstall/restart FF cycle 3 times and still SQ is sitting in the add-ons window and in the Tools menu. This is an unacceptable restriction on users' right of choice.
The low rating refers only to this uninstall problem, apart from this issue, SQ seems to do all that is claimed.