Greetings,
For some time we have had a whitelist of prefs that get sent to content
processes very early, in dom/ipc/ContentPrefs.cpp, not via the standard IPC
channels. There is also some checking machinery that makes sure that prefs
not on that list aren't accessed too early. It is a significant piece of
e10s technical debt that often trips people up (e.g. bug 1432979, bug
1439406).
I just landed the patch in bug 1436911, which eliminates the entire
mechanism by sending all necessary prefs early.
dom/ipc/ContentPrefs.{h,cpp} have been removed.
Nick
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