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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 2 weeks ago

Last reply by TyDraniu 2 weeks ago

Privacy

How can I block Google and other sites from knowing everything I do on Foxfire? Every time I visit anything that has membership Google is there asking to sign me in. I th… (read more)

How can I block Google and other sites from knowing everything I do on Foxfire? Every time I visit anything that has membership Google is there asking to sign me in. I thought Foxfire was supposed to be somewhat private. Thanks!, Mark

Asked by marksg67 2 weeks ago

Last reply by TyDraniu 2 weeks ago

Shopping sites often freeze Firefox

Hi Community, Whenever I am shopping online on my Macbook (MacOS Sierra 15.7.2) Firefox will begin to freeze and then hang on the checkout page. I notice this happens mo… (read more)

Hi Community,

Whenever I am shopping online on my Macbook (MacOS Sierra 15.7.2) Firefox will begin to freeze and then hang on the checkout page. I notice this happens most often with Shop/Shopify websites. Can someone help? This behavior seemed to begin this year about 6 months ago. I end up having to go Safari and reload my page, find the items again, and then I can check out. So problem is something about Firefox and my machine.

Thank you,

SAnd

Asked by andshilpa 2 weeks ago

Last reply by Denys 2 weeks ago

A website is greyed out because it displays a message

Website: https://www.londonpicturearchive.org.uk/view-item?i=119810&WINID=1764158938344 (for example) On Safari I see there is a message overlay from the website sayi… (read more)

Website: https://www.londonpicturearchive.org.uk/view-item?i=119810&WINID=1764158938344 (for example) On Safari I see there is a message overlay from the website saying "press the command key to zoom the image". On Firefox, this message is not displayed, and the website is greyed out.

I have looked at all my settings: I can't see anything wrong. Any ideas?

Asked by Jane XNC 2 weeks ago

Last reply by Denys 2 weeks ago

Firefox menus

Hi, I have been a user of Firefox on Macs ever since it first appeared as many websites simply did not work with Safari. The latest version of Firefox is causing me a fai… (read more)

Hi, I have been a user of Firefox on Macs ever since it first appeared as many websites simply did not work with Safari. The latest version of Firefox is causing me a fair amount of grief however. The main Menubar now extends more than two thirds the way across my screen (M4 Macbook air 15") so that menus for the OS are now not visible. I have buttons for, WiFi, Bluetooth, Time Machine, Volume, Battery, Time, Spotlight and Keyboard Maestro, which I use on a regular basis. It works fine on my second monitor but obviously I don't carry that with me when I'm away from home :-) I do not use the Profiles, Tools or Help Menus at all, so is there a way to remove them easily and permanently? This would enable me to see all of my OS control buttons Thank You

Asked by pd.thomas 2 weeks ago

Last reply by Denys 2 weeks ago

NEED Help NOW !!!!

I need help !! I am sharing for the last 2 days with NO issues and today suddenly Mozilla will not send people to my site!!!! It's a black friday sale link to my te… (read more)

I need help !!

I am sharing for the last 2 days with NO issues and today suddenly Mozilla will not send people to my site!!!! It's a black friday sale link to my teachable account -- it's valid and offers good info !! HELP!! PLEASE -- I am a small biz Herbalist -- This is devastating to me.

Carol Little [email 1 removed]@gmail.com has been my email for years.

NOW. mozilla is saying it's my OLD email [email 2 removed]@sympatico.ca -- this is not valid now. Not used for over 2 years!!

HELP PLEASE

Asked by fabulousthankyou 2 weeks ago

Last reply by Denys 2 weeks ago

re: profiles issue

HI there, Glad you folks have included an update to the 'profiles'. However, I'm having trouble with it. I previously created two profiles using 'about:profiles' functio… (read more)

HI there,

Glad you folks have included an update to the 'profiles'. However, I'm having trouble with it. I previously created two profiles using 'about:profiles' function. However, only of them has mapped on to the new profiles feature. When I try to add a profile in the new way to do it, I can only create a new one, I can't transfer a pre-existing.

See attachments. One shows the new profile manager with the 'work' profile. The second shows the 'about:profiles' with both 'work' and 'life'. How to I add 'life' to the new profile manager?

Asked by GF - Work 2 weeks ago

Last reply by Denys 2 weeks ago

passwords won't save

latest version of firefox will not let me save a password on a new website, it has always worked before, see image for settings. website is not included in exceptions … (read more)

latest version of firefox will not let me save a password on a new website, it has always worked before, see image for settings. website is not included in exceptions

Asked by norv 2 weeks ago

Last reply by jscher2000 - Support Volunteer 2 weeks ago

Thought-provoking stories

I read the FAQ about this feature. I read this about whether the stories are personalized to me: ... When personalization does occur, recommendations rely on a process … (read more)

I read the FAQ about this feature. I read this about whether the stories are personalized to me:

... When personalization does occur, recommendations rely on a process of story sorting and filtering that happens locally in your personal copy of Firefox.

But there is no place that tells me how to turn this off if I don't want the stories personalized to me, and I do not want them personalized. The algorithms make assumptions about what I want to read and learn. But I want to be free to encounter and learn things that I might not otherwise come across.

How can I avoid being pigeonholed and limited in this way?

Asked by emcn17 3 weeks ago

Last reply by Denys 3 weeks ago

How to select an audio output in Google Meet?

It's 2025, and the only way to select an audio output device when using Google Meet seems to be to change the system's default. Assuming you listen to music during your … (read more)

It's 2025, and the only way to select an audio output device when using Google Meet seems to be to change the system's default.

Assuming you listen to music during your day, from your PC, this means switching back and forth a few times during the day, just to switch meeting audio output to the headset for calls.

This doesn't seem to be a problem for Google Chrome (or derivatives). You can choose an audio device there in the web application, and it does remember this over sessions. Awesome.

Guess what I am using for Google Meet then. Not Firefox.

I really like Firefox. I do support Firefox. Also financially. But seeing all kinds of efforts into AI, VPN and other stuff I don't use and care about, but having a basic browser feature missing, I really wonder if that's the right decision.

So please, whoever prioritizes stuff: get the basics, the daily features, working smoothly, before venturing off on new hipster stuff. Because if you miss out on the basics of the browser, you might end up with neither an accepted browser, nor any new hipster stuff.

Asked by ctron 3 weeks ago

Last reply by TyDraniu 3 weeks ago