diff --git a/browser/app/profile/firefox.js b/browser/app/profile/firefox.js
index 4acab2ef10a3..c955b6b5f328 100644
--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -620,7 +620,6 @@ pref("browser.bookmarks.defaultLocation", "toolbar");
 
 // Scripts & Windows prefs
 pref("dom.disable_open_during_load",              true);
-pref("javascript.options.showInConsole",          true);
 
 // allow JS to move and resize existing windows
 pref("dom.disable_window_move_resize",            false);
diff --git a/js/src/tests/user.js b/js/src/tests/user.js
index 605dbf1ed952..830a7e64fcd5 100644
--- a/js/src/tests/user.js
+++ b/js/src/tests/user.js
@@ -10,7 +10,6 @@ user_pref("dom.disable_open_during_load", false);
 user_pref("dom.max_script_run_time", 0);
 user_pref("dom.max_chrome_script_run_time", 0);
 user_pref("javascript.allow.mailnews", true);
-user_pref("javascript.options.showInConsole", true);
 user_pref("layout.css.report_errors", true);
 user_pref("browser.warnOnQuit", false);
 user_pref("browser.cache.check_doc_frequency", 1);
diff --git a/mobile/android/app/mobile.js b/mobile/android/app/mobile.js
index 87e7238550cb..c8df4969ec56 100644
--- a/mobile/android/app/mobile.js
+++ b/mobile/android/app/mobile.js
@@ -470,8 +470,6 @@ pref("devtools.console.stdout.chrome", true);
 pref("device.camera.enabled", true);
 pref("media.realtime_decoder.enabled", true);
 
-pref("javascript.options.showInConsole", true);
-
 pref("full-screen-api.enabled", true);
 
 pref("direct-texture.force.enabled", false);
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 06e81aa7484d..b49b64a7a44c 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1202,8 +1202,6 @@ pref("javascript.options.mem.gc_helper_thread_ratio", 50);
 // JSGC_MAX_HELPER_THREADS
 pref("javascript.options.mem.gc_max_helper_threads", 8);
 
-pref("javascript.options.showInConsole", false);
-
 pref("javascript.options.shared_memory", true);
 
 pref("javascript.options.throw_on_debuggee_would_run", false);
diff --git a/remote/test/puppeteer/src/node/Launcher.ts b/remote/test/puppeteer/src/node/Launcher.ts
index 8ca62db389cc..309f50b39e62 100644
--- a/remote/test/puppeteer/src/node/Launcher.ts
+++ b/remote/test/puppeteer/src/node/Launcher.ts
@@ -508,8 +508,6 @@ class FirefoxLauncher implements ProductLauncher {
       'geo.wifi.scan': false,
       // No hang monitor
       'hangmonitor.timeout': 0,
-      // Show chrome errors and warnings in the error console
-      'javascript.options.showInConsole': true,
 
       // Disable download and usage of OpenH264: and Widevine plugins
       'media.gmp-manager.updateEnabled': false,
diff --git a/testing/geckodriver/src/prefs.rs b/testing/geckodriver/src/prefs.rs
index 075d0c680984..33da0e5caae1 100644
--- a/testing/geckodriver/src/prefs.rs
+++ b/testing/geckodriver/src/prefs.rs
@@ -120,9 +120,6 @@ lazy_static! {
         // that may cause unexpected test timeouts.
         ("idle.lastDailyNotification", Pref::new(-1)),
 
-        // Show chrome errors and warnings in the error console
-        ("javascript.options.showInConsole", Pref::new(true)),
-
         // Disable download and usage of OpenH264, and Widevine plugins
         ("media.gmp-manager.updateEnabled", Pref::new(false)),
 
diff --git a/testing/marionette/client/marionette_driver/geckoinstance.py b/testing/marionette/client/marionette_driver/geckoinstance.py
index 0bc04b3d0c24..046032496f40 100644
--- a/testing/marionette/client/marionette_driver/geckoinstance.py
+++ b/testing/marionette/client/marionette_driver/geckoinstance.py
@@ -84,7 +84,6 @@ class GeckoInstance(object):
         # Disable idle-daily notifications to avoid expensive operations
         # that may cause unexpected test timeouts.
         "idle.lastDailyNotification": -1,
-        "javascript.options.showInConsole": True,
         # Disable recommended automation prefs in CI
         "marionette.prefs.recommended": False,
         # Disable download and usage of OpenH264, and Widevine plugins
diff --git a/testing/marionette/components/marionette.js b/testing/marionette/components/marionette.js
index 6dd4031ec8d2..aff8afcdfd52 100644
--- a/testing/marionette/components/marionette.js
+++ b/testing/marionette/components/marionette.js
@@ -241,9 +241,6 @@ const RECOMMENDED_PREFS = new Map([
   // Do not scan Wifi
   ["geo.wifi.scan", false],
 
-  // Show chrome errors and warnings in the error console
-  ["javascript.options.showInConsole", true],
-
   // Do not prompt with long usernames or passwords in URLs
   ["network.http.phishy-userpass-length", 255],
 
diff --git a/testing/profiles/unittest-required/user.js b/testing/profiles/unittest-required/user.js
index fd589e4c1c4d..4030ec205950 100644
--- a/testing/profiles/unittest-required/user.js
+++ b/testing/profiles/unittest-required/user.js
@@ -146,7 +146,6 @@ user_pref("identity.fxaccounts.remote.root", "https://{server}/");
 // Avoid idle-daily notifications, to avoid expensive operations that may
 // cause unexpected test timeouts.
 user_pref("idle.lastDailyNotification", -1);
-user_pref("javascript.options.showInConsole", true);
 // Make sure CSS error reporting is enabled for tests
 user_pref("layout.css.report_errors", true);
 // Disable spammy layout warnings because they pollute test logs