When I enter my username and password, I want to open a new protected Firefox instance but it just complains that it can't locate the profile. I am forced to select it to open in the same window. I am on Dell™ XPS™ L502X, Windows 10 64-Bit , and using Mozilla Firefox 48.0.2. In debugging this problem, I tried to verify the profile by using the Profiler and the add-on Open Profile Folder 1.3.3.1. It shows the correct profile folder but Mozilla Firefox 48.0.2 says it can't find the Profile folder, While it is there! The profile.ini is correct. This used to work for me. Thank you, ~sreyes27