User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0 (Beta/Release) Build ID: 20140212131424 Steps to reproduce: On many sites I have zoomed in using "Ctrl++" (Ctrl and the plus key). Many of these were done months ago. I then went into edit->preferences-privacy-clear-recent history and chose to clear only the last hour. Actual results: All sites were set back to zoomed-out. Even the ones that had been set months ago. Expected results: Any site zoomed in more than an hour ago should have remained zoomed in