IS YOUR COMPUTER SLOW? RUN LIKE NEW
If they are not maintained, computers lose performance over time. Norton Utilities Ultimate can help significantly improve the performance of your Windows computers.
Applicable for: Windows
Message: "A script in the Norton extension is causing Firefox to slow down"
To resolve this problem, update Mozilla Firefox to the latest version.
Update Mozilla Firefox
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Start Mozilla Firefox.
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On the top-right corner, click the Open menu button.
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Click Help, and then click About Firefox.
Firefox checks for updates and downloads them automatically.
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Click Restart to update Firefox.
Update Norton extensions
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Start Mozilla Firefox.
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On the top-right corner, click the Open menu button.
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Click Add-ons.
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In the Add-ons window, click Extensions in the left pane.
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On the top of the page, click on the Gear icon, and then click Check for Updates.
Last modified: 04/24/2025
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