I use Multi-Account Containers all the time, in every profile, on every machine. So I wonder: what features do you use, which are broken by this extension, and

I use Multi-Account Containers all the time, in every profile, on every machine. So I wonder: what features do you use, which are broken by this extension, and which I am therefore missing out on? (Aside from GP's searching tabs with %, which I didn't know was broken but does have a workaround in Sidebery)