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Firefox on Mac M1 now using ungodly amount of RAM

  • 4 replies
  • 2 have this problem
  • 117 views
  • Last reply by JustinRez

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Firefox RAM usage on M1 Mac has dramatically increased. Unfortunately, b/c the memory usage is in firefox parent process, I can't simply terminate a process corresponding to a "tab", meaning I have no choice but to restart Firefox (closing & reopening all tabs) every hour or so of usage.

This is a new issue from a long-time firefox user (on multiple operating systems). It happened after I upgraded the Mac to "Monterey", which may or may not be coincidence.

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Chosen solution

Okay the latest update to Firefox 94 seems to have fixed the problem for me!

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I have this same problem on a 2018 (purchased new this year) Mac Mini Intel Core i3. Firefox is currently using 9GB of RAM but it will continue to climb as it has a few times now and I will receive the same error which I have never seen. It just started when I updated to Monterey.

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Thanks JustinRez. Looks like it's not specific to the M1 chip, but is instead related to the Monterey upgrade.

I end up having to restart Firefox about every hour or so of usage. Just restarted it now b/c memory consumption of the parent process was at 50GB (!), on a machine w/ 16GB of RAM.

Pretty bad memory leak, it seems. It's not clear to me if this is Apple's problem to fix or Firefox's.

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Another screenshot of the ridiculous RAM usage issue (likely a serious memory leak). Again note that I can't just kill child processes ("tabs") b/c the ostensible memory leak is in the parent process.

Ugh!

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Chosen Solution

Okay the latest update to Firefox 94 seems to have fixed the problem for me!

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