Created attachment 8657023 [details] Screenshot_2015-09-04-12-51-58.png User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0 Build ID: 20150826111858 Steps to reproduce: 1) go to Menu > Settings > Privacy 2) In the help text on "Clear on exit" it says and I quote "Firefox will automatically clear yor data whenever you select "Quit" from the main menu". 3) But, there no more Quit menu available any more. Actual results: 1) rephrase the text 2) or add the useful quit menu :) Expected results: Text should not include "Quit" in it.
The 'Quit' menu item is not displayed by default. You'll have to first enable 'Clear on exit' and then 'Quit' will be added to the Menu
As Catalin mentioned the preference enables the Quit option.