Created attachment 8574130 [details] screenshot of the preferences window when opened through the toolbar menu User Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:36.0) Gecko/20100101 Firefox/36.0 Build ID: 20150224134617 Steps to reproduce: 1. Open the menu from the main toolbar ( icon). 2. Click "Preferences". Actual results: * The preferences window opens. * The first tab that is displayed (by default, "General" tab) is completely blank. Expected results: * The tab should display all its preferences correctly. * This does not happen when opening the preferences from the menu bar (Edit > Preferences).
Do you have extensions installed? In particular, Adblock Plus and/or Ghostery? bug 1128127, bug 1110565
Yes, I have Adblock Edge and ghostery. Disabling addons does seem to solve the problem.