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Facebook Messenger sidebar uses too much CPU

  • Hi, I just noticed that when the Facebook Messenger sidebar button is enabled, the corresponding Opera process starts using 20-25% of CPU power. RAM goes up to over 1 GB. Telegram goes quite similar, as does WhatsApp. Those last two are not even signed in. Any clues how to fix this? Is it a bug to report?
    I'm on Win10, 4-core i7 (older one though), 12 GB RAM...