Not sure about chrome. but you can configure mozilla, or palemoon profiles so it will not connect anywhere anymore.
Make a "user.js" and check in about:config for "http" and "https" and then replace in "user.js" the ones you don't want.
Alternatively just use snort or tcpdump, see where it's going and block in firewall, host file or dns record.
For palemoon, you could use this one for example:
Code: Select all
user_pref("app.releaseNotesURL", "http://127.0.0.1/");
user_pref("app.support.baseURL", "http://127.0.0.1/");
user_pref("app.vendorURL", "http://127.0.0.1/");
user_pref("browser.contentHandlers.types.0.uri", "http://127.0.0.1/");
user_pref("browser.dictionaries.download.url", "http://127.0.0.1/");
user_pref("browser.feedback.url", "http://127.0.0.1/");
user_pref("browser.geolocation.warning.infoURL", "http://127.0.0.1/");
user_pref("browser.getdevtools.url", "http://127.0.0.1/");
user_pref("browser.mixedcontent.warning.infoURL", "http://127.0.0.1/");
user_pref("browser.search.geoip.url", "http://127.0.0.1/");
user_pref("browser.search.searchEnginesURL", "http://127.0.0.1/");
user_pref("browser.slowstartup.help.url", "http://127.0.0.1/");
user_pref("browser.trackingprotection.gethashURL", "http://127.0.0.1/");
user_pref("browser.trackingprotection.updateURL", "http://127.0.0.1/");
user_pref("devtools.devedition.promo.url", "http://127.0.0.1/");
user_pref("dom.mozApps.signed_apps_installable_from", "http://127.0.0.1/");
user_pref("extensions.blocklist.detailsURL", "http://127.0.0.1/");
user_pref("extensions.blocklist.itemURL", "http://127.0.0.1/");
user_pref("extensions.blocklist.url", "http://127.0.0.1/");
user_pref("extensions.getAddons.get.url", "http://127.0.0.1/");
user_pref("extensions.getAddons.getWithPerformance.url", "http://127.0.0.1/");
user_pref("extensions.getAddons.recommended.browseURL", "http://127.0.0.1/");
user_pref("extensions.getAddons.recommended.url", "http://127.0.0.1/");
user_pref("extensions.getAddons.search.browseURL", "http://127.0.0.1/");
user_pref("extensions.getAddons.search.url", "http://127.0.0.1/");
user_pref("extensions.getMoreThemesURL", "http://127.0.0.1/");
user_pref("extensions.update.background.url", "http://127.0.0.1/");
user_pref("extensions.update.url", "http://127.0.0.1/");
user_pref("extensions.webservice.discoverURL", "http://127.0.0.1/");
user_pref("geo.wifi.uri", "http://127.0.0.1/");
user_pref("identity.fxaccounts.auth.uri", "http://127.0.0.1/");
user_pref("media.gmp-manager.url", "http://127.0.0.1/");
user_pref("plugins.update.url", "http://127.0.0.1/");
user_pref("security.ssl.errorReporting.url", "http://127.0.0.1/");
user_pref("services.sync.fxa.privacyURL", "http://127.0.0.1/");
user_pref("services.sync.fxa.termsURL", "http://127.0.0.1/");
user_pref("services.sync.jpake.serverURL", "http://127.0.0.1/");
user_pref("services.sync.outdated.url", "http://127.0.0.1/");
user_pref("services.sync.privacyURL", "http://127.0.0.1/");
user_pref("services.sync.serverURL", "http://127.0.0.1/");
user_pref("services.sync.statusURL", "http://127.0.0.1/");
user_pref("services.sync.syncKeyHelpURL", "http://127.0.0.1/");
user_pref("services.sync.termsURL", "http://127.0.0.1/");
user_pref("services.sync.tokenServerURI", "http://127.0.0.1/");
user_pref("social.directories", "http://127.0.0.1/");
user_pref("social.whitelist", "http://127.0.0.1/");
user_pref("startup.homepage_override_url", "http://127.0.0.1/");
user_pref("startup.homepage_welcome_url", "http://127.0.0.1/");
user_pref("toolkit.telemetry.infoURL", "http://127.0.0.1/");
user_pref("toolkit.telemetry.server", "http://127.0.0.1/");