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Firefox doesn't respond to pressing the button to uninstall add-on

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When I click in uninstall button, in add-on manager, Firefox does nothing: any message, pop-up,... nothing, the click in that button is totally ignored.

This happened

Every time Firefox opened

Chosen solution

This problem was caused by add-on Yoono 7.2.0b24

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All Replies (2)

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I forgot to say that I deleted these files: extensions.ini, extensions.cache and extensions.rdf, but this hasn't resolved the problem.

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Chosen Solution

This problem was caused by add-on Yoono 7.2.0b24