If I press
Options -> Connections -> Copy Browser Proxy Configuration URL
I get the following path in clipboard:
file:///D:/Users/dims/%D0%9C%D0%BE%D0%B8%20%D1%84%D0%B0%D0%B9%D0%BB%D1%8B/Fiddler2/Scripts/BrowserPAC.js
i.e. it contains localized name of my folder in Windows.
Unfortunately, some programs do not understand localized names and do not work with this path (HtmlUnit library).
Is it possible to customize PAC file location in Fiddler?