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Five minutes to close Firefox

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E.g. I use four Firefox windows each with about five tabs. The memory use is to big so I want to close Firefox completely. This takes about five minutes, low processor use but heavy disc use. If I instead delete the Firefox process and restarts Firefox often it tries to resume all the old pages which takes o long time. I want a reliable way to close Firefox fast without risking it opens with lot of old pages.

E.g. I use four Firefox windows each with about five tabs. The memory use is to big so I want to close Firefox completely. This takes about five minutes, low processor use but heavy disc use. If I instead delete the Firefox process and restarts Firefox often it tries to resume all the old pages which takes o long time. I want a reliable way to close Firefox fast without risking it opens with lot of old pages.

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Are you using "Clear history when Firefox closes" to remove any data?
If you do then try to disable this feature and do it manually.

Use "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: Firefox > Quit Firefox; Linux: Firefox/File > Quit) to close Firefox if you are currently doing that by clicking the close X on the Firefox title bar.


Set the Integer pref browser.sessionstore.max_resumed_crashes to 0 on the about:config page to get the about:sessionrestore page immediately with the first start after a crash has occurred or the Task Manager was used to close Firefox.

You can open the about:config page via the location bar.

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The preferred way to close Firefox is using the menu entry.

   Windows: Firefox > Exit or File > Exit
   Mac: Firefox > Quit
   Linux: File > Quit