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In Bug 1622749 a user preference for where to open new documents (from a service worker notification) was temporarily overriden in order to quickly fix a crash that was happening in mozilla::dom::ClientOpenWindow. The crash was ocurring when the pref "browser.link.open_newwindow" was set to 2, meaning new documents are opened in a new window, instead of a new tab. The reason the browser crashed is because the path for opening a new document is different depending on the current user setting, and in NEWWINDOW case we did not get a browsing context returned when calling mozilla::dom::OpenWindow which resulted in a failed assertion. The solution is to pass in a callback to mozilla::dom::OpenWindow as part of nsOpenWindowInfo object, and invoke that callback with a corresponding BrowsingContext in nsFrameLoader when that browsing context is ready. After we call mozilla::dom::OpenWindow, we wait on a promise, that will be resolved when the callback is invoked, before executing the rest of the code that depends on the browsing context for a newly opened document being available. Differential Revision: https://phabricator.services.mozilla.com/D72745 |
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