--- a/devtools/client/preferences/devtools-client.js
+++ b/devtools/client/preferences/devtools-client.js
@@ -242,69 +242,26 @@ pref("devtools.webaudioeditor.inspectorW
 pref("devtools.webconsole.filter.error", true);
 pref("devtools.webconsole.filter.warn", true);
 pref("devtools.webconsole.filter.info", true);
 pref("devtools.webconsole.filter.log", true);
 pref("devtools.webconsole.filter.debug", true);
 pref("devtools.webconsole.filter.css", false);
 pref("devtools.webconsole.filter.net", false);
 pref("devtools.webconsole.filter.netxhr", false);
-// Deprecated - old console frontend
-pref("devtools.webconsole.filter.network", true);
-pref("devtools.webconsole.filter.networkinfo", false);
-pref("devtools.webconsole.filter.netwarn", true);
-pref("devtools.webconsole.filter.csserror", true);
-pref("devtools.webconsole.filter.cssparser", false);
-pref("devtools.webconsole.filter.csslog", false);
-pref("devtools.webconsole.filter.exception", true);
-pref("devtools.webconsole.filter.jswarn", true);
-pref("devtools.webconsole.filter.jslog", false);
-pref("devtools.webconsole.filter.secerror", true);
-pref("devtools.webconsole.filter.secwarn", true);
-pref("devtools.webconsole.filter.serviceworkers", true);
-pref("devtools.webconsole.filter.sharedworkers", false);
-pref("devtools.webconsole.filter.windowlessworkers", false);
-pref("devtools.webconsole.filter.servererror", false);
-pref("devtools.webconsole.filter.serverwarn", false);
-pref("devtools.webconsole.filter.serverinfo", false);
-pref("devtools.webconsole.filter.serverlog", false);
 
 // Browser console filters
 pref("devtools.browserconsole.filter.error", true);
 pref("devtools.browserconsole.filter.warn", true);
 pref("devtools.browserconsole.filter.info", true);
 pref("devtools.browserconsole.filter.log", true);
 pref("devtools.browserconsole.filter.debug", true);
 pref("devtools.browserconsole.filter.css", false);
 pref("devtools.browserconsole.filter.net", false);
 pref("devtools.browserconsole.filter.netxhr", false);
-// Remember the Browser Console filters (old frontend)
-pref("devtools.browserconsole.filter.network", true);
-pref("devtools.browserconsole.filter.networkinfo", false);
-pref("devtools.browserconsole.filter.netwarn", true);
-pref("devtools.browserconsole.filter.netxhr", false);
-pref("devtools.browserconsole.filter.csserror", true);
-pref("devtools.browserconsole.filter.cssparser", false);
-pref("devtools.browserconsole.filter.csslog", false);
-pref("devtools.browserconsole.filter.exception", true);
-pref("devtools.browserconsole.filter.jswarn", true);
-pref("devtools.browserconsole.filter.jslog", true);
-pref("devtools.browserconsole.filter.error", true);
-pref("devtools.browserconsole.filter.warn", true);
-pref("devtools.browserconsole.filter.info", true);
-pref("devtools.browserconsole.filter.log", true);
-pref("devtools.browserconsole.filter.secerror", true);
-pref("devtools.browserconsole.filter.secwarn", true);
-pref("devtools.browserconsole.filter.serviceworkers", true);
-pref("devtools.browserconsole.filter.sharedworkers", true);
-pref("devtools.browserconsole.filter.windowlessworkers", true);
-pref("devtools.browserconsole.filter.servererror", false);
-pref("devtools.browserconsole.filter.serverwarn", false);
-pref("devtools.browserconsole.filter.serverinfo", false);
-pref("devtools.browserconsole.filter.serverlog", false);
 
 // Web console filter bar settings
 pref("devtools.webconsole.ui.filterbar", false);
 // Browser console filter bar settings
 pref("devtools.browserconsole.ui.filterbar", false);
 
 // Max number of inputs to store in web console history.
 pref("devtools.webconsole.inputHistoryCount", 50);
@@ -319,40 +276,28 @@ pref("devtools.netmonitor.persistlog", f
 // in the Web Console to display a timestamp, or |false| to not display
 // any timestamps.
 pref("devtools.webconsole.timestampMessages", false);
 
 // Web Console automatic multiline mode: |true| if you want incomplete statements
 // to automatically trigger multiline editing (equivalent to shift + enter).
 pref("devtools.webconsole.autoMultiline", true);
 
-// Enable the new webconsole frontend
-pref("devtools.webconsole.new-frontend-enabled", true);
-pref("devtools.browserconsole.new-frontend-enabled", true);
-
 // Enable the webconsole sidebar toggle
 pref("devtools.webconsole.sidebarToggle", false);
 
 // Disable the new performance recording panel by default
 pref("devtools.performance.new-panel-enabled", false);
 
 // Enable client-side mapping service for source maps
 pref("devtools.source-map.client-service.enabled", true);
 
 // The number of lines that are displayed in the web console.
 pref("devtools.hud.loglimit", 10000);
 
-// The number of lines that are displayed in the old web console for the Net,
-// CSS, JS and Web Developer categories. These defaults should be kept in sync
-// with DEFAULT_LOG_LIMIT in the old webconsole frontend.
-pref("devtools.hud.loglimit.network", 1000);
-pref("devtools.hud.loglimit.cssparser", 1000);
-pref("devtools.hud.loglimit.exception", 1000);
-pref("devtools.hud.loglimit.console", 1000);
-
 // The developer tools editor configuration:
 // - tabsize: how many spaces to use when a Tab character is displayed.
 // - expandtab: expand Tab characters to spaces.
 // - keymap: which keymap to use (can be 'default', 'emacs' or 'vim')
 // - autoclosebrackets: whether to permit automatic bracket/quote closing.
 // - detectindentation: whether to detect the indentation from the file
 // - enableCodeFolding: Whether to enable code folding or not.
 pref("devtools.editor.tabsize", 2);