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

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

disable session restore

  • 16 uphendule
  • 5 zinale nkinga
  • 323 views
  • Igcine ukuphendulwa ngu John99

more options

Hello, is there any possibility to disable the session restore (using about:config or any other means)? I am not interested at all in saving the previous session, and I would like the browser would not drain any computer resource to make something I consider utterly useless.

Some time ago I used the preference browser.sessionstore.enabled set to false to inhibit this behavior, but I think it works no more.

Thanks in advance.

All Replies (16)

more options

Hello! By default Firefox doesn't restore the previous session. You just have the button "Restore Previous Session" at the bottom of the home page. Preference browser.sessionstore.enable doesn't exist anymore.

Now you can set browser.startup.page preference

  • Value = 0: start with a blank page (about:blank)
  • Value = 1: default (about:home)
  • Value = 2: last visited page
  • Value = 3: previous session

Hope you'll find an issue in these parameters to fix your problem!

more options

Hello. By default Firefox *DOES* log sessions in case you want to restore them. In the profile directory you will find a directory named sessionstore-backups containing data that I simply don't want Firefox to collect.

Is there a way to prevent this behaviour?

Okulungisiwe ngu Underpass

more options

According to me, the easiest way is to use Private Browsing. To active it, enter the following URL: about:preferences#privacy and change the parameter of Firefox will: to Never remember history or Use custom settings for history to customize. You'll be sure any data'll be collected!

more options

I can't recall why browser.sessionstore.enabled was removed, but it may be because Firefox wants to be able to restore the session after a mid-session update or to go into its Safe Mode. The session history file might also be used for windows and tabs you close during your session that you might want to re-open.

There are numerous preferences starting with browser.sessionstore that may limit what is stored in session history. For example, to not store session cookies in the file, you can change the value of these preferences:

browser.sessionstore.privacy_level => 2 browser.sessionstore.privacy_level_deferred => 2

To reduce time spent maintaining the file, you can extend the update interval from as often as every 15 seconds (this value is in milliseconds, so 15000 = 15 seconds) to something much longer such as once per minute:

browser.sessionstore.interval => 60000

more options

Thanks, it's interesting. But anyway, when I set the option browser.sessionstore.privacy_level to 2, Firefox still saves a huge amount of private data.

This is not only a privacy issue: the browser consumes CPU and memory to do something I don't need - something that I've already told Firefox not to do when I set "about: blank" as my default homepage.

This seems a bug to me.

more options

To request that the feature to disable it be re-added to future versions of Firefox, you can try one or more of these:

more options

Thanks, I'm not new to BugZilla - yet I thought there was an easier way to disable the session restore....

more options
more options

If you set the settings to clear history on close this would remove history and sessions afaik.

more options

You can also set the browser.sessionstore.max_serialize_ (back, forward) prefs to 0.

  • browser.sessionstore.max_serialize_
more options

Hello.

@guigs2: one problem is that I absolutely don't want to lose the browsing history, that I need very much.

@cor-el: and the other problem is that I need to be able to go back/forward in my browsing session. I simply don't want this data to be written, I can obviously accept that this data are somewhere in RAM while I'm browsing.

IMHO It's a security/performance issue. It's not the first, it will not be the last.

more options

The browser.sessionstore.max_serialize_ prefs only specifies how much back and forward history is stored in the sessionstore.js file and not the what you can use in the current session (browser.sessionhistory.max_entries). The default for back history in sessionstore.js is 10 and the forward history is unlimited (-1).

more options

So, if I set 0 to both these preferences, the sessionstore.js is not created? This could be a solution.

more options

The file is still created because you can't disable Session Restore, but will have less content and only have the information of currently visible tabs.

There is a lot of data stored in the file and some data can be disabled like the back/forward tab history and cookie data (browser.sessionstore.privacy_level).

Data for Recently Closed Tabs and Windows is stored as well.

The only way to prevent session data getting stored is Private Browsing mode.

You can use an extension to get Private Browsing mode support per tab.

more options

Hi cor_el, I know very well the PB mode (after all the articles we have translated in SUMO).

Yet I don't think that I'm completely satisfied with this solution.

more options

Underpass said

Bug filed: https://bugzilla.mozilla.org/show_bug.cgi?id=1176874 Thanks anyway.

It may help if the bug were confirmed and so new instead of unconfirmed. That possibly will need it to be marked as a RFE and would probably help if the bug removing the pref could be cross referenced. Alternatively the bug may be an unintended regression, but that is probably unlikely.

It may be useful to try the forums/mailing lists as mentioned above #answer-744969 to get background information on the change.