yoasif Mod , 10 months ago (edited 10 months ago)

Question: Most of resources I've found online lead me to believe that all I need is to modify browser.low_commit_space_threshold_mb. But it's nowhere to be found. about:config on MacOS is just returning an empty value and offers me to set it. Dare I? Would it actually work?

You can always remove the edit if it breaks things catastrophically. Why not try it and see?

https://searchfox.org/mozilla-central/source/xpcom/base/AvailableMemoryWatcherMac.cpp leads me to believe that this functionality should work if you can trigger it.

I currently have a puny 380 tabs open that consume 42GB RAM on my MBP '21 Max whatever (with 64GB total, shared with the GPU).

This seems like the bigger problem.

If Firefox is using an unexpected amount of RAM, report a bug by following the steps below:

1. Open about:memory in a new tab.
2. Click Measure and save...
3. Attach the memory report to a new bug
4. Paste your about:support info (Click Copy text to clipboard) to your bug.

If you are experiencing a bug, the best way to ensure that something can be done about your bug is to report it in Bugzilla. This might seem a little bit intimidating for somebody who is new to bug reporting, but Mozillians are really nice!

If you prefer not to open a bug, you can instead reduce the number of content processes used by Firefox to a lower amount by going to about:config and changing dom.ipc.processCount.webIsolated to a lower number.