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after last update on (32bit) version when i switch between tab the tab auto refresh

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after i open any tab when i go back the other tab in less than 5 second. it auto refresh and all of that begin after the last update what happen t mozilla

after i open any tab when i go back the other tab in less than 5 second. it auto refresh and all of that begin after the last update what happen t mozilla

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What I believe you may be referring to is Firefox's ability to unload tabs if it's running low on memory. This is designed to be a performance enhancement, since there's no point in keeping tabs that haven't been accessed in a while open and eating up your computer's resources. The feature is only supposed to trigger when your computer is low on memory, in which case you don't really have a lot to spare.

Fortunately, there appears to be a way to disable this feature. Simply do the following:

  1. Type about:config in your Firefox address bar to open the Configuration Editor.
  2. Bypass the warning (we'll be careful, I promise).
  3. Find the browser.tabs.unloadOnLowMemory preference.
  4. Double click it to change the value to false.
  5. Restart Firefox.

Hope this helps.