One suggestion Rated 4 out of 5 stars

It would be great to be able to set BarTab options on a per-site basis -- so it could be in place and enabled but nonfunctional on given sites -- eg, "do not affect the operation of child tabs from parent site www.x.com".

This review is for a previous version of the add-on (1.5.1). 

Maybe

Thanks for feature suggestion, though I'd really prefer it if you guys got in touch with me directly (e.g. email) so I can follow up.

I'm not sure I understand exactly what you mean. Certainly more flexibility would be always great, but I'm worried about making the UI (especially the preference settings) too complicated.