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Open Firefox. Click the small arrow in the upper left corner (next to the “Firefox” title).

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Click on the “Add-ons” menu.

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Click the “Remove” or “Disable” button located next to the desirable extension.

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You will need to restart Firefox, by clicking on the “Restart now” message that appeared.

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After Firefox opens again, you can close the “Add-ons Manager” tab by clicking the X on it.

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Now you can go to Etsy.com and make sure that the tool is not there anymore.
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Open Firefox. Go to ”Tools” and then to “Add-ons”.

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Under “Extensions” press the desirable extension, and there on the “Uninstall” or “Disable” button.

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If you choose to uninstall to extension, you will have to confirm your selection by pressing the “Uninstall” button in the confirmation window.

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Now you will be asked to restart Firefox. Please do so.

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Now you can go to Etsy.com and make sure that the tool is not there anymore.
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Open Google Chrome. Go to the following address:
chrome://extensions

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Under the desirable extension, click the “Uninstall” or “Disable” options.
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If you choose to uninstall the extension, you will have to confirm your selection by pressing the “Uninstall” button in the confirmation window.

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Now you can go to Etsy.com and make sure that the tool is not there anymore.