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how to install add-on in Firefox Android?

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in every add-on on any network

in every add-on on any network

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Unfortunately, a critical certificate used in verifying add-on signatures expired. There is not yet a supported solution for Android.

If you want a temporary workaround, please see this thread: https://support.mozilla.org/questions/1258219

Otherwise, the Add-ons team will post updates here: https://blog.mozilla.org/addons/2019/05/04/update-regarding-add-ons-in-firefox/

Modified by jscher2000 - Support Volunteer