%OS% can be WINNT or Darwin or Linux...

  • On Firefox for OS X, I when I select Help->Firefox Help I see a url with Darwin in it momentarily and then the “real” url after the redirect, same with WINNT on Windows
  • The %OS% values are:
    • Darwin for OSX
    • WINNT for Windows
    • Linux for Linux
    • not sure what it is for Android (maybe Android?)
  • nsIURLFormatter https://dxr.mozilla.org/mozilla-central/source/toolkit/components/urlformatter/nsURLFormatter.js
  • The pref is app.support.baseURL and the value of that is passed to formatURL in nsURLFormatter.js
  • all of the values inside %NAME% are replaced at run time when creating the url

Leave a comment on github