Changelog:

• Update to Chrome 51. #5648
• Returning a non-void value in beforeunload handler nows prevents the page to unload. #5648
• Improve the "Error opening app" dialog. #5610
• Improve how Promise is detected in remote module. #5689
• Add webpageURL parameter to app.setUserActivity(type, userInfo[, webpageURL]) API. #5658
• Fix document.visibilityState and visibilitychange event not working in <webview> tag. #5684
• Fix unexpected behavior when calling app.quit() while there are BrowserWindows with closable set to false. #5701

Migration Notice:

• Due to a change of Chrome 51, returning non-empty strings or true in beforeunload handler now prevents the page to unload. #5648
• The private ATOM_SHELL_INTERNAL_RUN_AS_NODE environment variable has been removed, the code relies on it should use the public ELECTRON_RUN_AS_NODE environment variable instead. #5682
• The internal ATOM_SHELL_ environment variables have been renamed, if you are maintaining your own Electron fork, you might be affected. #5683