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2024.10
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Studio User Guide

Last updated Jul 29, 2025

Extension on Firefox versions older than 65.0

Description

Mozilla introduced an extension signing verification algorithm in Firefox, which disables add-ons for Firefox version 65.0 and lower. As such, if you install the UiPath Extension for Firefox on the browser version 65.0 or lower, the following error message is displayed:

This add-on could not be installed because it appears to be corrupt.

Solution 1

Update Firefox to version v66.0.4 or higher.

Solution 2

Starting with Studio 2020.8, the Firefox extension is newly signed and it should be properly installed on older versions of the Firefox browser.

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