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The "current" window is not necessarily the same as the currently focused window. If this function is called from a background script, then it returns the currently focused window. But if it is called from a script whose document is associated with a particular browser window, then it returns that browser window. Fix: Can't Set Firefox as Default Browser on Windows 10 Jun 13, 2020 How to Close a Browser Tab/Window with JavaScript
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Panic Button – Get this Extension for 🦊 Firefox (en-US) Jul 03, 2020 Top 10 Best Free Lightweight Browsers for Windows 10 Dec 02, 2018 How to Open New Windows in Firefox | Your Business Mozilla Firefox is a free web browser available for Windows, Mac and Linux in more than 70 languages. When you're exploring the web using Firefox, you can open links and visit pages either in new tabs, which allow you to view multiple websites in the same window, or new windows.