Firefox: How to open each browser in a separate process?

Posted on 2006-05-15
Last Modified: 2012-06-27
If one crashes, I don't want them all to crash.  How do I fix that?

Thank you
Question by:fuze44
    LVL 97

    Accepted Solution

    Greetings, fuze44 !

    You can open separate windows of Firefox for different webpages.  But you cannot separate the Firefox processes such that if one window crash, it will not affect the other windows.

    Best wishes!
    LVL 54

    Assisted Solution


    I believe there is an exception to the first reply.  The Firefox environment variable MOZ_NO_REMOTE can be set to 1 and firefox will open up in another process.  However I am almost positive that another profile is required.  The intended use of this would be for someone developing extensions.  This page ( has some information on the environment variable and other development information.

    If you are just browsing the Internet and/or don't want to use multiple profiles, then there is no way to have firefox windows open in a new process.  Whether you use a new tab or a new window, firefox is set up to use the existing firefox.exe process.

    I hope this information is helpful.  I have not used the feature but let us know if you have any questions.

    LVL 44

    Assisted Solution

    correct, if you run one instance of FF and it dies, all windows will close.  But there is an easy way to get around this, which I do all the time.  Mozilla is the SAME as Firefox except that it also has MAIL included.

    So I install BOTH FF and mozilla, and all the risky sites I use FF browser for, and all the "safer" sites I use mozilla for, since it also has mail, and I dont want to lose the mail.  You should try mozilla mail, it is 100x better and more secure than Outlook disaster.  

    So with both browsers running, and you have say 5 windows open each, you only lose half of the windows on a crash from one browser.  Firefox doesnt crash mozilla and vice versa, so you dont lose everything this way.
    LVL 2

    Expert Comment

    There is an extension that can auto reload sessions after a crash...I will post it when I get to work tomorrow...I am unsure of the name of it
    LVL 2

    Assisted Solution


    here it is...saves sessions during a crash

    Author Comment

    Thanks to all of you.  Your answers were very helpful.
    LVL 54

    Expert Comment

    Your welcome.  Glad to help.  Thanks for the grade, the points and the fun question.


    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    What Should I Do With This Threat Intelligence?

    Are you wondering if you actually need threat intelligence? The answer is yes. We explain the basics for creating useful threat intelligence.

    Suggested Solutions

    I previously wrote an article addressing the use of UBCD4WIN and SARDU. All are great, but I have always been an advocate of SARDU. Recently it was suggested that I go back and take a look at Easy2Boot in comparison.
    Healthcare organizations in the United States must adhere to the guidance of both the HIPAA (Health Insurance Portability and Accountability Act) and HITECH (Health Information Technology for Economic and Clinical Health Act) for securing and protec…
    Viewers will learn how to use the Hootsuite Dashboard.
    The viewer will learn how to successfully download and install the SARDU utility on Windows 7, without downloading adware.

    759 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    13 Experts available now in Live!

    Get 1:1 Help Now