Performance Issue Report: Firefox Unresponsive with High Memory Usage on macOS

Dear Firefox Support Team, I am writing to report an issue I’ve been experiencing with Firefox on my MacBook Air (M3, 8GB RAM). Recently, Firefox has been becoming unres… (read more)

Dear Firefox Support Team,

I am writing to report an issue I’ve been experiencing with Firefox on my MacBook Air (M3, 8GB RAM). Recently, Firefox has been becoming unresponsive quite often, and the Activity Monitor shows significantly high memory usage. For context, I typically have two Firefox windows running simultaneously, with approximately 5 tabs open in each window (10 tabs total). This is when I notice the performance degradation and high memory usage.

To help you investigate, I’ve attached:

  • A screenshot of the memory usage in Activity Monitor when Firefox is running.
  • A screenshot of the extensions currently enabled in Firefox.

I am open to suggestions, such as disabling or removing certain extensions if they might be causing conflicts. However, I wanted to report this issue first to understand if this is a known problem or if there are optimizations planned for Firefox on Apple Silicon Macs.

Let me know if you need additional details, such as Firefox version, macOS version, or specific steps to reproduce the issue. I’d be happy to provide any information that can help resolve this.

Thank you for your time and assistance. I look forward to your response.

Best regards, Hemant

Asked by Hemant Tripathi 3 days ago

Last reply by TyDraniu 3 days ago

Firefox locks completely after about a minute. How to extract list of open tabs (and groups) and start over?

FF 145.0.2 (64 bit) canonical-002 - 1.0 running on Kubuntu 25.10 has suddenly started locking up completely after a minute or so with an "unresponsive". As I have just p… (read more)

FF 145.0.2 (64 bit) canonical-002 - 1.0 running on Kubuntu 25.10 has suddenly started locking up completely after a minute or so with an "unresponsive". As I have just put in the crash reporter: "I haven't had problems with FF before but just possible that this relates to my growing problems with Thunderbird see https://support.mozilla.org/en-US/questions/1551791. I putting a question in Mozill Support about trying to keep my tabs and perhaps groups before doing a complete reinstall." So my questions here are:

  • I am planning to to a complete clean reinstallation from snap but is there a better (more stable) installation?
  • either snap specific or generically: is there a way I can find the open tab list from the debris of this snap installation (and perhaps the groups but that's less important)?

TIA,

Chris

Asked by ce_mozilla 4 days ago

Last reply by jonzn4SUSE 3 days ago

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This is happening more frequently. sometimes clicking links works but the cursor will not respond if i hover over the new tab button. To continue I have to select a new f… (read more)

This is happening more frequently. sometimes clicking links works but the cursor will not respond if i hover over the new tab button. To continue I have to select a new firefox window, The unresponsive window remains in error even when a new working window is active.

Asked by phil6306an 3 days ago

Last reply by jonzn4SUSE 3 days ago

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Asked by w.preiser 1 month ago

Last reply by jscher2000 - Support Volunteer 3 days ago

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Asked by marksg67 3 days ago

Last reply by TyDraniu 3 days ago

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Hi, I have 30 Firefox processes running and they are taking up ~2700 MB (84%) memory. I have 8GB installed memory. I'm running Win 11. What causes processes to run an… (read more)

Hi, I have 30 Firefox processes running and they are taking up ~2700 MB (84%) memory. I have 8GB installed memory. I'm running Win 11. What causes processes to run and how do I know which ones I can end?

Any help is appreciated.

Thanks, John

Asked by John Sowder 4 days ago

Last reply by jonzn4SUSE 3 days ago

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在firefox中只要按下了alt键,就会出现菜单栏,不想要出现菜单栏怎么办,我的截图快捷键alt+A很方便不想调整那个,也不知道哪里可以调整快捷键

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Last reply by Denys 4 days ago

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Several times since the last update, I have been unable to use at least four sites that I have been using. Either I can't sign in or site functionality is not working. … (read more)

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Last reply by fakename8-firefox 4 days ago