The key web browser developers are competing against each other with innovative new features that improve our browsing experience. Some of these new features aren't exactly compelling, but Opera using a system of previewing open tabs by showing a visual preview of the tab contents, when you hold your mouse over each tab. If you have a few tabs open from the same website, this makes differentiating the tab contents far easier. With Firefox, you only get a text description of each open tab.
Tab Scope 0.1.7 is a Firefox extension that will enable you to visualise a tab when you hold your mouse over each open tab. However, this only works with the Windows version of Firefox. Once installed, you'll wonder why this function isn't included in Firefox as standard.
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