Closed as fixed:

Firefox

• uMatrix uses the false domain 1.wyciwyg-scheme instead of the real one
  • uMatrix reports what the Firefox API reports to it: Firefox should be fixed to report seamlessly wyciwyg:// URLs so as to avoid forcing extensions to deal with such URLs, which should be strictly for internal consumption by Firefox.
  • Until the issue is fixed in Firefox (if ever), a workaround in uMatrix has been implemented in order to deal with such URLs in a seamless manner in its UI.
  • Those URLs still cause quirks however: for example forcing a reload won't work. This is not a uMatrix issue, even Firefox's reload button does not work in such case. The workaround is to click the address bar as if to edit the current URL and press Enter to force a reload.

Core

• My rules tab hangs with cloud storage support