The actions :
SWS: Toggle zoom to selected items or time selection*
are not usable in sessions that includes more than just a bit of automation by all appearances.
They take an ungodly amount of time to zoom back out. I've had to switch to the zoom tool of the extension, using CTRL+middle mouse button in this case. The simple edit focus type of action toggle is screwed.
But at least the extension works in pre17
. Thanks for that fix.