toolkit/content/debug.js
debug.js is now included by globalOverlay.js, but if that's not in your
scope you can just #include debug.js directly.
NS_ASSERT() shows a dialog box containing a stack trace when it's called
with a condition that isn't true. The dialog box will be suppressed in
final builds, but in nightlies and alphas, it's useful for encouraging
bug submissions. To disable the dialogs, set XUL_ASSERT_PROMPT=0 in
your environment.
bug=327349
r=darin@meer.net, gavin.sharp@gmail.com
implementation. Use --enable-places to use this code instead of the Mork
history implementation. This code is currently in active development, so some
things are broken, notably all the UI which uses RDF.
bug 266174
r=bryner