I have my default browser, desktop menu (like Start Menu), launchers (like Quick Launch), and desktop shortcuts start Firefox with -new-instance, but not with -no-remote. I need this option because certain websites like Yahoo! won't permit one to log in to separate accounts in the same browser. A " New Private Window" would only work in rare instances. When I try to open links from external programs, a profile window pops up instead of simply opening a link in the existing instance of Firefox. I understand that some programs like Skype simply misbehave on Linux, but this is occuring all of the time. It appears that -new-instance is acting like -no-remote again. I would report this as a bug, but bug reporting seems to be a waste of time unless it is something major. Also, please don't tell me to reset Firefox, disable extensions, upgrade Firefox, or any number of simple options. If anyone else has had this problem, please let me know how you fixed it. I believe it does not matter what operating system you use. --Thanks