So, my assumptions for `BrowsingContext::Top()` don't hold even within content processes: https://searchfox.org/mozilla-central/rev/8a63fc190b39ed6951abb4aef4a56487a43962bc/dom/base/nsFrameLoader.cpp#248-251 It says that in addition to `mozbrowser` we could create a top-level `BrowsingContext` in a content process for "a xul browser element with a `remote="true"` marker". Do all content processes have a hidden XUL document with `browser remove=true` at the top of the docshell hierarchy, or is there something else that involves XUL in a content process?
Bug 1556627 Comment 58 Edit History
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So, my assumptions for `BrowsingContext::Top()` don't hold even within content processes: https://searchfox.org/mozilla-central/rev/8a63fc190b39ed6951abb4aef4a56487a43962bc/dom/base/nsFrameLoader.cpp#248-251 It says that in addition to `mozbrowser` we could create a top-level `BrowsingContext` in a content process for "a xul browser element with a `remote="true"` marker". Do all content processes have a hidden XUL document with `browser remote=true` at the top of the docshell hierarchy, or is there something else that involves XUL in a content process?