about:config:

• accessibility.blockautorefresh: true
• browser.pocket.enabled: false
• browser.safebrowsing.enabled: false
• browser.safebrowsing.downloads.enabled: false
• browser.safebrowsing.malware.enabled: false
• browser.search.suggest.enabled: false
• browser.urlbar.trimURLs: false
• datareporting.healthreport.service.enabled: false
• datareporting.healthreport.uploadEnabled: false
• dom.event.clipboardevents.enable: false
• full-screen-api.approval-required: false
• general.warnOnAboutConfig: false
• geo.enabled: false
• loop.enabled: false
• media.eme.enabled: false
• media.mediasource.enabled: true
• media.peerconnection.enabled: false
• toolkit.telemetry.enabled: false

extensions:

• disconnect
• heartbleed notifier
• https-everywhere
• ipvfox
• private tab
• ublock