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Metamask extension installed but not open

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I have installed metamask extension in Firefox Quantum version 60.0.1(64-bit). The extension successfully installed but not open. When I try to open the popup appears and closed immediately.

I have installed metamask extension in Firefox Quantum version 60.0.1(64-bit). The extension successfully installed but not open. When I try to open the popup appears and closed immediately.

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You need to contact its support.

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