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Does the latest update have issue with switching between one tab and another?

  • 3 replies
  • 2 have this problem
  • 31 views
  • Last reply by v197

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I think Firefox updated a day or so ago on my computer. Since then, when switching between tabs there are times when it takes several seconds to go to the tab I click on, and Firefox is locked up while I wait for the switch. Is this a known issue, and if so when might it be fixed?

All Replies (3)

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Firefox will detect if your computer’s memory is running low, which is defined as lower than 400MB, and suspend unused tabs that you haven’t used or looked at in a while. The new tab unload feature is controlled on the about:config page with a preference that you can set to false to disable this feature. Keep in mind that this makes you vulnerable to low memory issues.

  • browser.tabs.unloadOnLowMemory = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.



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 causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window
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Thank you, I'll give that a try the next time it starts happening.

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I have this setting: browser.tabs.unloadOnLowMemory = false but switching from one tab to another is very slow I have a fast and powerful computer with 16GB RAM. The problem is not in memory, but in FireFox