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If the Firefox Health Report says your browser is running slow, try the Refresh feature. The Refresh feature removes add-ons while saving essential information such as your bookmarks, browsing history, passwords, cookies and web form auto-fill information. Here's how it works:
- Click the menu button , click and select .
- Click then in the confirmation window that opens. Firefox will close to refresh itself.
- When finished, a window will list your imported information. Click the button. Firefox will open.
- Select whether you want Firefox to restore all or some windows and tabs and click the button.