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Slow Firefox for Deasktop!!!!!!!!!!

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Hello, Can you tell me what happen with your browser in around last 1 year? My internet connection is: Download~1000 Mbps,Upload~600 Mbps. See attached photo what is my internet,when i test it with different browsers which i have installed on my PC. See what is the statistic for Firefox O.O WTF? I like your browser and use it from very long time,but if will it crash my connection,i will forget for it! Do something!

Hello, Can you tell me what happen with your browser in around last 1 year? My internet connection is: Download~1000 Mbps,Upload~600 Mbps. See attached photo what is my internet,when i test it with different browsers which i have installed on my PC. See what is the statistic for Firefox '''O.O''' '''WTF?''' I like your browser and use it from very long time,but if will it crash my connection,i will forget for it! Do something!
Attached screenshots

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* Desktop

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Note that your security software can cause problems by checking downloaded content in realtime.

You can create a new profile as a quick test to check if a new clean profile works better.

See "Creating a profile":

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Thank you cor-el for you help,but nothing happen. :/

Modified by Angel Of Death