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Firefox cant install addons due to connection failure?

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Every time I try to install a addon, it says "This addon cannot be installed due to connection failures"

Every time I try to install a addon, it says "This addon cannot be installed due to connection failures"

Alle svar (1)

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I can see similar issue here, you may check the conversation to solve your problem. Link: https://support.mozilla.org/questions/855759