466832 - Ctrl+Shift+Del (clear private data) doesn't completely clear browser history

Status: RESOLVED DUPLICATE of bug 380852

(Firefox :: Security, defect)

Description

[Vladimir Kondratyev]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b2pre) Gecko/20081125 Minefield/3.1b2pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1b2pre) Gecko/20081125 Minefield/3.1b2pre

When I press CTRL+SHIFT+DEL, I suspect that browser should completely "forget" the pages which I've visited. But currently this is not true. I've discovered that browser remembers somewhere font changes, which I've done.

For example, 

1) Visit https://bugzilla.mozilla.org and increase font size
2) Close this tab and press Ctrl+Shift+Del and check all options to clease verething
3) Visit https://bugzilla.mozilla.org again
4) Browser remembers that the font for this URL was changed, i.e. that fact that I visited some page is stored inside the browser.

Reproducible: Always

Steps to Reproduce:
1.
2.
3.