Specific preferences are courtesy of /u/pxji of Reddit.
1. Copy the following text:
user_pref("browser.pocket.api", "0.0.0.0");
user_pref("browser.pocket.site", "0.0.0.0");
user_pref("browser.pocket.enabled", false);
user_pref("browser.toolbarbuttons.introduced.pocket-button", false);
user_pref("browser.pocket.oAuthConsumerKey", "asdf");
user_pref("privacy.trackingprotection.enabled", true); //block various tracking urls. speeds up browsing a bit
user_pref("media.peerconnection.enabled", false); //disable webrtc to prevent local ip address leaking
user_pref("browser.urlbar.trimURLs", false); //always show http in urls
user_pref("geo.enabled", false); //permanently disable geo location
//user_pref("javascript.enabled", false); //disable javascript. not recommended
//prefetching is bad for privacy
user_pref("network.dns.disablePrefetch", true);
user_pref("network.prefetch-next", false);2. Save it in one of the following locations:
- *Linux/BSD:
$HOME/.mozilla/firefox/*.default/user.js - Windows:
%APPDATA%/Mozilla/Firefox/Profiles/*.default/user.js - OS X:
$HOME/Library/Application Support/Firefox/Profiles/*.default/user.js(Thank you, @blakkheim!)
3. Close and reopen Firefox, if already running.