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Firefox starting too many instances when launched

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Every time I launch Firefox it creates 12-13 instances of Firefox along with one each for Chrome and Console.

I don't need that many instances. Typically I have no more than 3-4 tabs open.

Is there a Configuration setting that I can change to reduce the number of instances to 5 and greatly reduce the amount of time it takes to launch.

I am running Windows 10 Pro V21H2 at current update level. I have a custom made tower with 512GB SSD and a Core2 Duo processing running at 2.93 GHz with 8 GB Ram. Firefox is V17.0.1.

Every time I launch Firefox it creates 12-13 instances of Firefox along with one each for Chrome and Console. I don't need that many instances. Typically I have no more than 3-4 tabs open. Is there a Configuration setting that I can change to reduce the number of instances to 5 and greatly reduce the amount of time it takes to launch. I am running Windows 10 Pro V21H2 at current update level. I have a custom made tower with 512GB SSD and a Core2 Duo processing running at 2.93 GHz with 8 GB Ram. Firefox is V17.0.1.
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These are not instances, but processes. For instance network process, gpu process, and so on. You need them all.