Increasing the privacy of Firefox and Ubuntu

about:config

Change the following entries through about:config:

name	changed
browser.safebrowsing.blockedURIs.enabled	false
browser.safebrowsing.downloads.remote.enabled	false
browser.safebrowsing.malware.enabled	false
browser.safebrowsing.phishing.enabled	false
browser.search.geoip.url	leave blank
browser.startup.homepage_override.mstone	ignore
dom.push.enabled	false
dom.webnotifications.enabled	false
extensions.blocklist.enabled	false
extensions.getAddons.cache.enabled	false
network.captive-portal-service.enabled	false
network.dns.disablePrefetch	true
network.dns.disablePrefetchFromHTTPS	true
network.http.speculative-parallel-limit	0
network.prefetch-next	false
privacy.trackingprotection.pbmode.enabled	false
services.sync.prefs.sync.privacy.trackingprotection.enabled	false
services.sync.prefs.sync.privacy.trackingprotection.pbmode.enabled	false

hosts

sudo nano /etc/hosts

127.0.0.1       connectivity-check.ubuntu.com
127.0.0.1       content-signature-2.cdn.mozilla.net
127.0.0.1       firefox.settings.services.mozilla.com

Links

• How to stop Firefox from making automatic connections
• How to Disable Network Connectivity Checking in Ubuntu 17.10