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Is it normal FF (developer edition) is consuming more than 2Gb of RAM (with only one tab opened)?

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Firefox consumes almost 2Gb of RAM with only one tab open. I find this surprising, and it's a major performance issue for me.

Do you have an explanation or solutions to reduce this memory overconsumption?

Firefox consumes almost 2Gb of RAM with only one tab open. I find this surprising, and it's a major performance issue for me. Do you have an explanation or solutions to reduce this memory overconsumption?
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