Temporary Containers is almost perfect, except when you create a new tab it takes a split second for that tab to be assigned a new temporary container. For that split moment, if you're typing in an address whatever you've typed in so far will be erased when the new tab is switched to the temporary container. On my underpowered machine, this usually means one or two keys are dropped, such that if i was typing in "google" immediately after creating a new tab, the effect is as if I typed "ogle".

Perhaps on faster hardware, the switch to the temporary container happens faster than you can begin typing.