In Firefox Portable 67 I noticed a problem with Windows jump lists in the taskbar - there are menus to open a new tab, a new window or a frequently visited sites - when Firefox Portable is open and I click on any of these menu items a new instance of Firefox Portable is opened in new profile, not the one I'm currently using. This is not how the jump lists work for installed Firefox - the currently used profile is used and that's how it should be. This effectively makes the taskbar jump lists useless since opening a new instance in a new profile is almost never what the user intends.
I know it is somehow related to the issue of setting up Firefox 67 as the default browser but in this case I don't want to set up Firefox Portable as my default browser - I just want to be able to use the taskbar to open a new Firefox tab or window without switching to a currently open Firefox window and pressing Ctrl+T or N. Any idea how this can be fixed?