This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

Firefox eats memory which slows down my machine, gets beachball

  • 2 fhreagra
  • 1 leis an bhfadhb seo
  • 5 views
  • Freagra is déanaí ó cor-el

more options

MAC OS 10.14.2 Firefox 64

Firefox continues to eat memory, whether used vigorously or just sitting. This causes the beach ball "wait" icon to appear for seconds when switching to/from another window or app or email

This one year old retina machine, with 8MB is slower than my 11 year old IMAC with 4MB

MAC OS 10.14.2 Firefox 64 Firefox continues to eat memory, whether used vigorously or just sitting. This causes the beach ball "wait" icon to appear for seconds when switching to/from another window or app or email This one year old retina machine, with 8MB is slower than my 11 year old IMAC with 4MB

All Replies (2)

more options

Go to Activity monitor and watch out for services which are eating up your RAM

more options

Try Low Resolution mode: https://support.apple.com/ht202471

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window