3. Alternative Methods for Targeting Firefox with CSS
   Understanding Browser-Specific StylingWhen working with CSS, it's sometimes necessary to apply styles that are specific to a particular browser
4. Alternative Methods for Checking DOM Element Visibility
   Understanding the Concept:Viewport: The visible area of a web page within a browser window.DOM Element: A component of an HTML document that represents a specific part of the content
5. How to Remove the Dotted Outline Around Buttons and Links in Firefox
   Firefox shows a dotted outline around focused elements (like buttons and links) to help users navigate webpages with the keyboard