+++ This bug was initially created as a clone of Bug #494538 +++ When opening a page source window during a private browsing session, after leaving the private browsing session the page source window stays open. Reproducible: Always Steps to Reproduce: 1. Open a private browsing session by either using the keyboard shortcut (CTRL+SHIFT+P) or by the menu item (Tools> Start Private Browsing) 2. Navigate to any webpage 3. Right-click on the page, select the "View Page Source" menu entry 4. The page source window is opened 5. Re-focus the main firefox window and leave private browsing mode by either using the keyboard shortcut or the menu item 6. Private browsing mode closes, but the page source window opened during private browsing stays open with the content still shown Actual Results: The private browsing session closes, but the page source window opened during private browsing stays open Expected Results: When a private browsing session is closed, the page source window opened during that session should close as well.

Related to: https://bugzilla.mozilla.org/show_bug.cgi?id=462639 ?