new Verion faults Rated 1 out of 5 stars

it's frustrating how bad the new verion got. I can not change the location for the file permanently and also the file extension is not beeing remembered.

This review is for a previous version of the add-on (2.4). 

This is the inevitable change in Firefox - all Xul-addons will die out in Firefox 57
https://blog.mozilla.org/addons/2017/02/16/the-road-to-firefox-57-compatibility-milestones/