Microsoft finally fixes 5 year old Windows Defender high CPU bug on Mozilla Firefox April 10, 2023 by admin Tweet Microsoft and Mozilla have managed to fix a five year old bug in Windows Defender which was causing relatively high CPU usage on Firefox compared to other browsers like Chrome and Edge. Read more… Neowin Related Posts:Mozilla outs Firefox 136.0.2 to fix cookie-deleting…Mozilla Firefox is about to add an important feature…Firefox vs Chrome: Mozilla finally manages to trump…Firefox 112.0.2 fixes high memory usage, broken…Mozilla fixes Firefox crashes on Windows