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Firefox をカスタマイズしてみよう
There are many ways to customize Firefox, such as adding features to Firefox with add-ons and customizing the New Tab page. You can also customize Firefox controls, buttons and toolbars. Do you miss something you use a lot? The Firefox toolbar is easy to customize. Is there something you don't use all the time? Try adding it to the overflow menu. We'll show you how. Customize the overflow menu or
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