Remove deprecated prefs

user.js

 user_pref("browser.urlbar.suggest.topsites", false); // don't suggest top sites
 user_pref("browser.urlbar.suggest.calculator", true); // enable calculations in url bar
 user_pref("browser.urlbar.unitConversion.enabled", true); // enable unit conversions in url bar
-user_pref("browser.urlbar.quickactions.enabled", false); // disable quick actions
 user_pref("browser.urlbar.autoFill.adaptiveHistory.enabled", true); // enable adaptive history
-user_pref("browser.urlbar.shortcuts.quickactions", false); // disable quick actions
 user_pref("browser.urlbar.resultMenu.keyboardAccessible", false); // skip url suggestion menus
 user_pref("findbar.highlightAll", true); // highlight all found matches
 user_pref("media.videocontrols.picture-in-picture.video-toggle.enabled", false); // hide picture-in-picture button
 user_pref("media.eme.enabled", true); // allow DRM
 user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); // enable user styles
 user_pref("layout.css.grid-template-masonry-value.enabled", true);
-user_pref("dom.enable_web_task_scheduling", true);
 user_pref("browser.urlbar.groupLabels.enabled", false); // hide firefox suggest label
+user_pref("browser.urlbar.trimURLs", false); // dont trim URLs
 user_pref("browser.compactmode.show", true); // add compact mode
-user_pref("browser.tabs.tabmanager.enabled", false); // hide tab manager until needed
 user_pref("privacy.userContext.enabled", true); // enable containers
 user_pref("privacy.userContext.ui.enabled", true); // enable containers
 
 user_pref("extensions.getAddons.showPane", false); // disable recommendations in about:addons
 user_pref("extensions.htmlaboutaddons.recommendations.enabled", false); // disable recommendations in about:addons
 user_pref("browser.discovery.enabled", false); // disable recommendations in about:addons
-user_pref("browser.messaging-system.whatsNewPanel.enabled", false); // disable what's new
 user_pref("extensions.pocket.enabled", false); // disable pocket
 user_pref("browser.uitour.enabled", false); // disable ui tour
 user_pref("browser.uitour.url", ""); // disable ui tour
 /* Telemetry */
 user_pref("datareporting.policy.dataSubmissionEnabled", false);
 user_pref("datareporting.healthreport.uploadEnabled", false);
+user_pref("datareporting.usage.uploadEnabled", false);
 user_pref("toolkit.telemetry.unified", false);
 user_pref("toolkit.telemetry.enabled", false);
 user_pref("toolkit.telemetry.server", "data:,");
 user_pref("toolkit.telemetry.coverage.opt-out", true);
 user_pref("toolkit.coverage.opt-out", true);
 user_pref("toolkit.coverage.endpoint.base", "");
-user_pref("browser.ping-centre.telemetry", false);
 user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
 user_pref("browser.newtabpage.activity-stream.telemetry", false);
 user_pref("app.shield.optoutstudies.enabled", false);
 user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false);
 user_pref("browser.contentanalysis.enabled", false);
 user_pref("browser.contentanalysis.default_result", 0);
-
-/* Sanitize */
-// user_pref("privacy.sanitize.sanitizeOnShutdown", false); // clear data on shutdown
-// user_pref("privacy.clearOnShutdown.cache", false); // save cache
-// user_pref("privacy.clearOnShutdown.cookies", false); // save cookies
-// user_pref("privacy.clearOnShutdown.downloads", true); // clear downloads (requires clearing history)
-// user_pref("privacy.clearOnShutdown.formdata", false); // save form data
-// user_pref("privacy.clearOnShutdown.history", false); // save history
-// user_pref("privacy.clearOnShutdown.offlineApps", false); // save cache
-// user_pref("privacy.clearOnShutdown.openWindows", false); // save open windows
-// user_pref("privacy.clearOnShutdown.sessions", false); // save sessions
-// user_pref("privacy.clearOnShutdown.siteSettings", false); // save site settings