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Fake firefox is eating up 66% of CPU on imac. How do I delete it?

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  • 2 have this problem
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  • Last reply by FredMcD

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I am running 55.0.3 (64 bit) Up to Date Firefox My 2009 mac running Sierra 10.12.4 is getting hot.

Activity Monitor shows the following:

(no Icon) firefox CPU 62% CPU Time 31:07:10 (notice that firefox is all small letters icon Activity Monitor CPU 2.6% 45:37 time icon Firefox 2.1% 25:22 etc. see attached .jpg screen shot of Activity Monitor CPU screen.

When I quit Firefox the fake firefox does NOT disappear from the activity monitor!!!

Is there a way to detect/delete the fake firefox running on my machine?

I am running 55.0.3 (64 bit) Up to Date Firefox My 2009 mac running Sierra 10.12.4 is getting hot. Activity Monitor shows the following: (no Icon) firefox CPU 62% CPU Time 31:07:10 (notice that firefox is all small letters icon Activity Monitor CPU 2.6% 45:37 time icon Firefox 2.1% 25:22 etc. see attached .jpg screen shot of Activity Monitor CPU screen. When I quit Firefox the fake firefox does NOT disappear from the activity monitor!!! Is there a way to detect/delete the fake firefox running on my machine?

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In order to better assist you with your issue please provide us with a screenshot. If you need help to create a screenshot, please see How do I create a screenshot of my problem?

Once you've done this, attach the saved screenshot file to your forum post by clicking the Browse... button below the Post your reply box. This will help us to visualize the problem.

Thank you!


You may have ad/mal-ware. Further information can be found in this article; https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.