security breach critical firefox? does not require master password

I put with a master password in firefox. When I start the computer and firefox, it opens the browser to the way I saved him when I stopped. This includes the sites that require passwords. They all open with no password request. Then randomly at a time later asked me the master password. Shouldn't it ask the password first, before opening protected sites?

It's a little complicated.

If you allow sites to set persistent cookies to keep you logged between sessions, Firefox never needs to use your password saved; you are already on each visit to both Firefox keeps the cookie (weeks, months or years depending on what the site specified).

Alternatively, if you limit the sites to the definition of session cookies, after you close Firefox, these cookies are normally deleted. But there is an exception for the windows and tabs you left pending.

When you restore a previous session, Firefox reverts this session cookies, including those you kept connected sites. Secure sites (HTTPS) are treated differently depending on when you restore your session:

  • When Firefox is set to start automatically with windows and tabs: secure session cookies are maintained and restored. Your registered username is unnecessary and not used.
  • When Firefox is set to start at the top with a home page, and you have the ability to restore your previous session manually: secure session cookies are ignored. You will need to identify yourself again.

So, if (1) allow you sites to set persistent cookies, or (2) have set to restore your previous session of Firefox, and you do not close the session, it would be normal that no logon is required when revisiting the secured sites.

To make sure that this does not happen, you have a few different options:

(1) use only session cookies AND change some hidden settings to ensure that they are not saved when your session is restored; or

(2) delete all cookies at the stop.

I can list for those steps if you are interested.

Tags: Firefox

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