Allowing sessionStorage

ProtonMail uses the latest in web technologies to secure your data, and requires sessionStorage. This article will explain what sessionStorage is and address common issues.

What is sessionStorage?

sessionStorage is a new web technology that lets you store website information securely on your device. We use sessionStorage to store your MailboxPassword which is used to decrypt all messages in your account. Without sessionStorage we would need to ask you for your MailboxPassword every single time you read or send an email. Thanksfully, that’s not the case.

I got an error saying I don’t have sessionStorage. How do I get it?

First, see if your browser supports sessionStorage, a list of supported browsers can be found here.

For All Browsers: 

Please ensure Cookies are Enabled.

  1. FireFox
    • Type in about:config in the address bar and hit enter.Enabling session Storage for Firefox about config
    • Click on the I’ll be careful, I promise button.Click on prompt button
    • To Enable DOM Storage, just scroll down and double click on the dom.storage.enabled entry to change the “value” from false to true DOM enable option
  2. Internet Explorer
    • click on Tools and Internet Options.Enabling session Storage for IE (Internet Explorer)
    •  Click on the Advanced tab, then scroll down to the Security section under Settings.Advanced Settings Internet Explorer
    • Check the Enable DOM Storage box and click on OK.DOM storage
  3. Chrome
    • Open Options  Enabling session Storage for Chrome
    • select the “Under the Hood” tabChrome Settings Under the Hood
    • Click on “Content settings” Chrome Content Settings
    • select “Cookies” and set “Block sites from setting any data”Chrome Block sites from setting any data
  4. Safari

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5 comments

  1. Ron French

    I can not figure out how to create different storage boxes for each person that I correspond to and need to keep the email for future use. I know Im not being clear but it would normally go under the inbox icon.
    Thank you,
    Ron

  2. Asma

    I am trying to log into my protonmail inbox but it is not letting me. It keeps taking me to a page that says “click here if you have a problem.” I clicked and I got here to comments. I need to login because I gave this email address to a potential employer whom I am in the middle of an exchange with and this is a crucial time for me to interact.

  3. Steve R

    I am using firefox 40.0.2 and it is loading a blank screen, will protonmail support this version as it was the only option when I recently installed firefox.

  4. KS

    The instructions for enabling sessions and allowing cookies appear to be incorrect (don’t follow the format of Chrome ver 65) and in conflict (ie cant both allow cookies and enable sessions). I may be misunderstanding the instructions, however.
    thanks.

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