window.controllers is deprecated. Do not use it for UA detection. https-everywhere.js:335
Firefox Web Console says:
window.controllers is deprecated. Do not use it for UA detection.
in file https-everywhere.js line 335 var c = domWin.controllers.getControllerForCommand("https-everywhere-storage");
for extension HTTPS Everywhere. (https://www.eff.org/files/https-everywhere-4.0.1.xpi)
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information