In such situations, the “Warn on Close” feature comes to the rescue. Sometimes a user is working on multiple tabs and he might accidentally click on the close (x) button of the window or might press hotkeys such as Alt+F4, Ctrl+Shift+Q (has been disabled in Chrome 70 and later), etc which are used to close browser window. “Warn on Close” feature prevents the web browser from accidentally closing multiple running tabs.
Google Chrome, Microsoft Edge and Opera browsers are based on Chromium browsing engine so all have similar features and functionality.
“ Warn on Close” (also known as warn on exit or warn on quit) is an essential feature which should be present in all web browsers but unfortunately some popular web browsers such as Google Chrome, Microsoft Edge and Opera lack this basic functionality.
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