Bug#682369: firefox-esr disobeys "until I close Firefox" cookie setting

[Robert Munyer]

Control: retitle -1 firefox-esr disobeys "until I close Firefox" cookie setting
Control: reassign -1 firefox-esr 45.5.1esr-1

Bug still present in firefox-esr 45.5.1esr-1, in Debian "stretch".
To replicate:

Open Firefox ESR.

Configure Firefox thus:
  ≡
    Preferences
      Privacy
        History
          Firefox will: Use custom settings for history
            Accept cookies from sites
              Keep until: I close Firefox

Browse to http://noscript.net/features .

Click the "Go back one page" button.

Close Firefox.

After the preceding steps, the cookie must not exist.
To see that it does exist, continue with the following steps:

Open Firefox ESR.

Click "Restore Previous Session".

View cookies:
  ≡
    Preferences
      Privacy
        History
          Show Cookies...