I didn't know about Remote Settings. I found some detailed information on Mozilla's website [1] and I have three entries about RemoteSettings in about:config.

I didn't know about Remote Settings. I found some detailed information on Mozilla's website [1] and I have three entries about RemoteSettings in about:config. app.normandy.startupRolloutPrefs.browser.topsites.useRemoteSetting browser.topsites.useRemoteSetting browser.urlbar.quicksuggest.remoteSettings.enabled I turned them to false. This [2] explains what Normandy is. [1] https://firefox-source-docs.mozilla.org/services/settings/index.html https://firefox-source-docs.mozilla.org/services/settings/in... [2] https://firefox-source-docs.mozilla.org/toolkit/components/normandy/normandy/index.html#components-normandy https://firefox-source-docs.mozilla.org/toolkit/components/n...