Rated 2 out of 5 stars

Yip I'm having the same "connecting" problem using FF Portable 16.0.1.

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

Thanks for the report

Yes, there is a conflict between the two add-ons, thanks for the report. IE Tab 2 is doing the right thing in the way it customizes the setting of the browser title. The way Tab Mix Plus customizes the functionality is extremely fragile and prone to breakage.
In any case, we have implemented a workaround which is pending review, but it can be downloaded here: