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What's New with Firefox 142

(www.mozilla.org)
177 points keepamovin | 2 comments | 02 Sep 25 10:50 UTC | HN request time: 0s | source
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Shank ◴[02 Sep 25 12:44 UTC] No.45102381[source]▶
Lately, I’ve experienced memory leaks in Firefox that I’m too amateur to diagnose, that leads to Firefox eating 8gb of memory in some web renderer process. So when I excitedly check the changelog hoping for a summary of possible changes, I’m disappointed that there isn’t a verbose changelog for advanced users. I’m sure I could search bugzilla, but it makes me sad that the only “important” things are the headlining features.
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1. Yizahi ◴[02 Sep 25 15:09 UTC] No.45104100[source]▶
It is very likely that one single site is responsible for this. For example in my usage, Jenkins portal is leaking memory like hell, will fill up a few GBs in a a day and jack up CPU utilization to 100%.

I has hundreds of tabs at that point, so I had to find out the culprit. What I did was open a task manager and expand Fifefox process to see dozens of subprocesses. I then sorted by memory (or by cpu) to find out worst offender and killed only that single subprocess without touching others. And after doing that I've looked at the list of tabs and saw that one of them has changed to the crash report tab, with a visibly different icon. And looking at it I saw that it was originally Jenkins portal. Now I proactively close it's tabs and leaks stopped. Maybe this will help you.

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2. dorgo ◴[02 Sep 25 17:20 UTC] No.45106105[source]▶
cool. There is also about:performance with cpu & memory for each tab / addon. Hmm, it looks like all extensions are combined in a single entry. So, maybe not per addon.