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How to increase performance

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Firefox v55.0.3 64bit is extremely slow in loading pages (so slow that I'm using IceDragon in most cases). I looked up increasing performance by using Hardware Acceleration by increasing the Content Process Limit (see attached). I have Hardware Acceleration selected. However, the selection for Content Process for my version of Firefox is set to one and the option is grayed out so I can't change it.

Any ideas on how to increase my performance? Running Win 10 Pro 64bit CU with latest updates.

Firefox v55.0.3 64bit is extremely slow in loading pages (so slow that I'm using IceDragon in most cases). I looked up increasing performance by using Hardware Acceleration by increasing the Content Process Limit (see attached). I have Hardware Acceleration selected. However, the selection for Content Process for my version of Firefox is set to one and the option is grayed out so I can't change it. Any ideas on how to increase my performance? Running Win 10 Pro 64bit CU with latest updates.
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