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How can I install Firefox ESR for Android?

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Trying to download Firefox ESR onto my Android phone as I require access to Microsoft Silverlight.

Trying to download Firefox ESR onto my Android phone as I require access to Microsoft Silverlight.

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Microsoft Silverlight is only for Windows and Mac OSX. https://www.microsoft.com/getsilverlight/Get-Started/Install/Default

There is no Firefox 52 ESR for Android as that is desktop Firefox only.

Also the only Plugin that Android Firefox really made use of was Flash Player however Adobe stopped making the Android version back on September 10 2013. Mozilla later stopped support of it as of Firefox 56.0 (Sept 2017) and later.