diff --git a/.prettierignore b/.prettierignore
index cc30adc2aaa6..2c0f18ef9d91 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -37,9 +37,6 @@ modules/libpref/test/unit/data/testPrefSticky.js
 modules/libpref/test/unit/extdata/testExt.js
 services/sync/tests/unit/prefs_test_prefs_store.js
 
-# Ignore testing pref files which aren't parsed normally.
-testing/profiles/**/user.js
-
 # Ignore CORS fixtures which require specific resource hashes.
 dom/security/test/sri/script*
 
diff --git a/testing/mozbase/mozprofile/mozprofile/prefs.py b/testing/mozbase/mozprofile/mozprofile/prefs.py
index cd95c6021300..6c3b1173c85f 100644
--- a/testing/mozbase/mozprofile/mozprofile/prefs.py
+++ b/testing/mozbase/mozprofile/mozprofile/prefs.py
@@ -172,12 +172,31 @@ class Preferences(object):
         marker = "##//"  # magical marker
         lines = [i.strip() for i in mozfile.load(path).readlines()]
         _lines = []
+        multi_line_pref = None
         for line in lines:
             # decode bytes in case of URL processing
             if isinstance(line, bytes):
                 line = line.decode()
-            if not line.startswith(pref_setter):
+            pref_start = line.startswith(pref_setter)
+
+            # Handle preferences split over multiple lines
+            # Some lines may include brackets so do our best to ensure this
+            # is an actual expected end of function call by checking for a
+            # semi-colon as well.
+            if pref_start and not ");" in line:
+                multi_line_pref = line
                 continue
+            elif multi_line_pref:
+                multi_line_pref = multi_line_pref + line
+                if ");" in line:
+                    if "//" in multi_line_pref:
+                        multi_line_pref = multi_line_pref.replace("//", marker)
+                    _lines.append(multi_line_pref)
+                    multi_line_pref = None
+                continue
+            elif not pref_start:
+                continue
+
             if "//" in line:
                 line = line.replace("//", marker)
             _lines.append(line)
diff --git a/testing/mozbase/mozprofile/tests/files/prefs_with_multiline.js b/testing/mozbase/mozprofile/tests/files/prefs_with_multiline.js
new file mode 100644
index 000000000000..f3860f6472cd
--- /dev/null
+++ b/testing/mozbase/mozprofile/tests/files/prefs_with_multiline.js
@@ -0,0 +1,5 @@
+/* globals user_pref */
+user_pref(
+  "browser.long.preference.name.that.causes.the.line.to.wrap",
+  "itislong"
+);
diff --git a/testing/mozbase/mozprofile/tests/test_preferences.py b/testing/mozbase/mozprofile/tests/test_preferences.py
index 95d26f189cf1..6cc62546e399 100755
--- a/testing/mozbase/mozprofile/tests/test_preferences.py
+++ b/testing/mozbase/mozprofile/tests/test_preferences.py
@@ -392,6 +392,15 @@ def test_read_prefs_with_interpolation():
     assert dict(read_prefs) == expected_prefs
 
 
+def test_read_prefs_with_multiline():
+    """test reading preferences from a prefs.js file that contains multiline prefs"""
+
+    path = os.path.join(here, "files", "prefs_with_multiline.js")
+    assert dict(Preferences.read_prefs(path)) == {
+        "browser.long.preference.name.that.causes.the.line.to.wrap": "itislong"
+    }
+
+
 def test_read_prefs_ttw():
     """test reading preferences through the web via wptserve"""
 
diff --git a/testing/profiles/common/user.js b/testing/profiles/common/user.js
index 49f6683ba4d6..fd6a0d8eff74 100644
--- a/testing/profiles/common/user.js
+++ b/testing/profiles/common/user.js
@@ -11,10 +11,22 @@ user_pref("browser.dom.window.dump.enabled", true);
 user_pref("devtools.console.stdout.chrome", true);
 // asrouter expects a plain object or null
 user_pref("browser.newtabpage.activity-stream.asrouter.providers.cfr", "null");
-user_pref("browser.newtabpage.activity-stream.asrouter.providers.snippets", "null");
-user_pref("browser.newtabpage.activity-stream.asrouter.providers.message-groups", "null");
-user_pref("browser.newtabpage.activity-stream.asrouter.providers.whats-new-panel", "null");
-user_pref("browser.newtabpage.activity-stream.asrouter.providers.messaging-experiments", "null");
+user_pref(
+  "browser.newtabpage.activity-stream.asrouter.providers.snippets",
+  "null"
+);
+user_pref(
+  "browser.newtabpage.activity-stream.asrouter.providers.message-groups",
+  "null"
+);
+user_pref(
+  "browser.newtabpage.activity-stream.asrouter.providers.whats-new-panel",
+  "null"
+);
+user_pref(
+  "browser.newtabpage.activity-stream.asrouter.providers.messaging-experiments",
+  "null"
+);
 user_pref("browser.newtabpage.activity-stream.feeds.system.topstories", false);
 user_pref("browser.newtabpage.activity-stream.feeds.snippets", false);
 user_pref("browser.newtabpage.activity-stream.tippyTop.service.endpoint", "");
@@ -46,7 +58,10 @@ user_pref("extensions.experiments.enabled", true);
 // Turn off extension updates so they don't bother tests
 user_pref("extensions.update.enabled", false);
 // Prevent network access for recommendations by default. The payload is {"results":[]}.
-user_pref("extensions.getAddons.discovery.api_url", "data:;base64,eyJyZXN1bHRzIjpbXX0%3D");
+user_pref(
+  "extensions.getAddons.discovery.api_url",
+  "data:;base64,eyJyZXN1bHRzIjpbXX0%3D"
+);
 // Treat WebExtension API/schema warnings as errors.
 user_pref("extensions.webextensions.warnings-as-errors", true);
 // Disable useragent updates.
@@ -56,7 +71,10 @@ user_pref("media.gmp-manager.updateEnabled", false);
 // Don't do network connections for mitm priming
 user_pref("security.certerrors.mitm.priming.enabled", false);
 // Enable some dangerous features for test code. :-(
-user_pref("security.turn_off_all_security_so_that_viruses_can_take_over_this_computer", true);
+user_pref(
+  "security.turn_off_all_security_so_that_viruses_can_take_over_this_computer",
+  true
+);
 user_pref("xpinstall.signatures.required", false);
 // Prevent Remote Settings to issue non local connections.
 user_pref("services.settings.server", "data:,#remote-settings-dummy/v1");
diff --git a/testing/profiles/perf/user.js b/testing/profiles/perf/user.js
index e1ec21999831..a22410b73b78 100644
--- a/testing/profiles/perf/user.js
+++ b/testing/profiles/perf/user.js
@@ -22,21 +22,45 @@ user_pref("browser.newtabpage.activity-stream.telemetry", false);
 user_pref("browser.reader.detectedFirstArticle", true);
 user_pref("browser.safebrowsing.blockedURIs.enabled", false);
 user_pref("browser.safebrowsing.downloads.enabled", false);
-user_pref("browser.safebrowsing.downloads.remote.url", "http://127.0.0.1/safebrowsing-dummy/downloads");
+user_pref(
+  "browser.safebrowsing.downloads.remote.url",
+  "http://127.0.0.1/safebrowsing-dummy/downloads"
+);
 user_pref("browser.safebrowsing.malware.enabled", false);
 user_pref("browser.safebrowsing.passwords.enabled", false);
 user_pref("browser.safebrowsing.phishing.enabled", false);
-user_pref("browser.safebrowsing.provider.google.gethashURL", "http://127.0.0.1/safebrowsing-dummy/gethash");
-user_pref("browser.safebrowsing.provider.google.updateURL", "http://127.0.0.1/safebrowsing-dummy/update");
-user_pref("browser.safebrowsing.provider.google4.gethashURL", "http://127.0.0.1/safebrowsing4-dummy/gethash");
-user_pref("browser.safebrowsing.provider.google4.updateURL", "http://127.0.0.1/safebrowsing4-dummy/update");
-user_pref("browser.safebrowsing.provider.mozilla.gethashURL", "http://127.0.0.1/safebrowsing-dummy/gethash");
-user_pref("browser.safebrowsing.provider.mozilla.updateURL", "http://127.0.0.1/safebrowsing-dummy/update");
+user_pref(
+  "browser.safebrowsing.provider.google.gethashURL",
+  "http://127.0.0.1/safebrowsing-dummy/gethash"
+);
+user_pref(
+  "browser.safebrowsing.provider.google.updateURL",
+  "http://127.0.0.1/safebrowsing-dummy/update"
+);
+user_pref(
+  "browser.safebrowsing.provider.google4.gethashURL",
+  "http://127.0.0.1/safebrowsing4-dummy/gethash"
+);
+user_pref(
+  "browser.safebrowsing.provider.google4.updateURL",
+  "http://127.0.0.1/safebrowsing4-dummy/update"
+);
+user_pref(
+  "browser.safebrowsing.provider.mozilla.gethashURL",
+  "http://127.0.0.1/safebrowsing-dummy/gethash"
+);
+user_pref(
+  "browser.safebrowsing.provider.mozilla.updateURL",
+  "http://127.0.0.1/safebrowsing-dummy/update"
+);
 user_pref("browser.shell.checkDefaultBrowser", false);
 user_pref("browser.startup.couldRestoreSession.count", -1);
 user_pref("browser.tabs.remote.autostart", true);
 user_pref("browser.warnOnQuit", false);
-user_pref("datareporting.healthreport.documentServerURI", "http://127.0.0.1/healthreport/");
+user_pref(
+  "datareporting.healthreport.documentServerURI",
+  "http://127.0.0.1/healthreport/"
+);
 user_pref("devtools.chrome.enabled", false);
 user_pref("devtools.debugger.remote-enabled", false);
 user_pref("devtools.theme", "light");
@@ -49,17 +73,38 @@ user_pref("dom.push.connection.enabled", false);
 user_pref("extensions.autoDisableScopes", 10);
 user_pref("extensions.blocklist.enabled", false);
 user_pref("extensions.checkCompatibility", false);
-user_pref("extensions.getAddons.get.url", "http://127.0.0.1/extensions-dummy/repositoryGetURL");
-user_pref("extensions.getAddons.search.browseURL", "http://127.0.0.1/extensions-dummy/repositoryBrowseURL");
-user_pref("extensions.hotfix.url", "http://127.0.0.1/extensions-dummy/hotfixURL");
-user_pref("extensions.systemAddon.update.url", "http://127.0.0.1/dummy-system-addons.xml");
-user_pref("extensions.update.background.url", "http://127.0.0.1/extensions-dummy/updateBackgroundURL");
+user_pref(
+  "extensions.getAddons.get.url",
+  "http://127.0.0.1/extensions-dummy/repositoryGetURL"
+);
+user_pref(
+  "extensions.getAddons.search.browseURL",
+  "http://127.0.0.1/extensions-dummy/repositoryBrowseURL"
+);
+user_pref(
+  "extensions.hotfix.url",
+  "http://127.0.0.1/extensions-dummy/hotfixURL"
+);
+user_pref(
+  "extensions.systemAddon.update.url",
+  "http://127.0.0.1/dummy-system-addons.xml"
+);
+user_pref(
+  "extensions.update.background.url",
+  "http://127.0.0.1/extensions-dummy/updateBackgroundURL"
+);
 user_pref("extensions.update.notifyUser", false);
-user_pref("extensions.update.url", "http://127.0.0.1/extensions-dummy/updateURL");
+user_pref(
+  "extensions.update.url",
+  "http://127.0.0.1/extensions-dummy/updateURL"
+);
 user_pref("identity.fxaccounts.auth.uri", "https://127.0.0.1/fxa-dummy/");
 user_pref("identity.fxaccounts.migrateToDevEdition", false);
 user_pref("media.capturestream_hints.enabled", true);
-user_pref("media.gmp-manager.url", "http://127.0.0.1/gmpmanager-dummy/update.xml");
+user_pref(
+  "media.gmp-manager.url",
+  "http://127.0.0.1/gmpmanager-dummy/update.xml"
+);
 // Don't block old libavcodec libraries when testing, because our test systems
 // cannot easily be upgraded.
 user_pref("media.libavcodec.allow-obsolete", true);
@@ -75,7 +120,10 @@ user_pref("plugin.state.flash", 0);
 user_pref("privacy.reduceTimerPrecision", false); // Bug 1445243 - reduces precision of tests
 user_pref("privacy.trackingprotection.annotate_channels", false);
 user_pref("privacy.trackingprotection.enabled", false);
-user_pref("privacy.trackingprotection.introURL", "http://127.0.0.1/trackingprotection/tour");
+user_pref(
+  "privacy.trackingprotection.introURL",
+  "http://127.0.0.1/trackingprotection/tour"
+);
 user_pref("privacy.trackingprotection.pbmode.enabled", false);
 user_pref("security.enable_java", false);
 user_pref("security.fileuri.strict_origin_policy", false);
diff --git a/testing/profiles/raptor/user.js b/testing/profiles/raptor/user.js
index dc82a29defc2..d0a102906310 100644
--- a/testing/profiles/raptor/user.js
+++ b/testing/profiles/raptor/user.js
@@ -31,23 +31,23 @@ user_pref("toolkit.content-background-hang-monitor.disabled", true);
 
 // disable async stacks to match release builds
 // https://developer.mozilla.org/en-US/docs/Mozilla/Benchmarking#Async_Stacks
-user_pref('javascript.options.asyncstack', false);
+user_pref("javascript.options.asyncstack", false);
 
 // disable Firefox Telemetry (and some other things too)
 // https://bugzilla.mozilla.org/show_bug.cgi?id=1533879
-user_pref('datareporting.healthreport.uploadEnabled', false);
+user_pref("datareporting.healthreport.uploadEnabled", false);
 
 // Telemetry initialization happens on a delay, that may elapse exactly in the
 // middle of some raptor tests. While it doesn't do a lot of expensive work, it
 // causes some I/O and thread creation, that can add noise to performance
 // profiles we use to analyze performance regressions.
 // https://bugzilla.mozilla.org/show_bug.cgi?id=1706180
-user_pref('toolkit.telemetry.initDelay', 99999999);
+user_pref("toolkit.telemetry.initDelay", 99999999);
 
 // disable autoplay for raptor tests
-user_pref('media.autoplay.default', 5);
-user_pref('media.autoplay.ask-permission', true);
-user_pref('media.autoplay.blocking_policy', 1);
-user_pref('media.autoplay.block-webaudio', true);
-user_pref('media.allowed-to-play.enabled', false);
-user_pref('media.block-autoplay-until-in-foreground', true);
+user_pref("media.autoplay.default", 5);
+user_pref("media.autoplay.ask-permission", true);
+user_pref("media.autoplay.blocking_policy", 1);
+user_pref("media.autoplay.block-webaudio", true);
+user_pref("media.allowed-to-play.enabled", false);
+user_pref("media.block-autoplay-until-in-foreground", true);
diff --git a/testing/profiles/unittest-required/user.js b/testing/profiles/unittest-required/user.js
index 5c63e9be20df..251346d3fdfb 100644
--- a/testing/profiles/unittest-required/user.js
+++ b/testing/profiles/unittest-required/user.js
@@ -26,25 +26,64 @@ user_pref("browser.bookmarks.max_backups", 0);
 user_pref("browser.console.showInPanel", true);
 // Don't connect to Yahoo! for RSS feed tests.
 // en-US only uses .types.0.uri, but set all of them just to be sure.
-user_pref("browser.contentHandlers.types.0.uri", "http://test1.example.org/rss?url=%s");
-user_pref("browser.contentHandlers.types.1.uri", "http://test1.example.org/rss?url=%s");
-user_pref("browser.contentHandlers.types.2.uri", "http://test1.example.org/rss?url=%s");
-user_pref("browser.contentHandlers.types.3.uri", "http://test1.example.org/rss?url=%s");
-user_pref("browser.contentHandlers.types.4.uri", "http://test1.example.org/rss?url=%s");
-user_pref("browser.contentHandlers.types.5.uri", "http://test1.example.org/rss?url=%s");
+user_pref(
+  "browser.contentHandlers.types.0.uri",
+  "http://test1.example.org/rss?url=%s"
+);
+user_pref(
+  "browser.contentHandlers.types.1.uri",
+  "http://test1.example.org/rss?url=%s"
+);
+user_pref(
+  "browser.contentHandlers.types.2.uri",
+  "http://test1.example.org/rss?url=%s"
+);
+user_pref(
+  "browser.contentHandlers.types.3.uri",
+  "http://test1.example.org/rss?url=%s"
+);
+user_pref(
+  "browser.contentHandlers.types.4.uri",
+  "http://test1.example.org/rss?url=%s"
+);
+user_pref(
+  "browser.contentHandlers.types.5.uri",
+  "http://test1.example.org/rss?url=%s"
+);
 // Indicate that the download panel has been shown once so that whichever
 // download test runs first doesn't show the popup inconsistently.
 user_pref("browser.download.panel.shown", true);
 user_pref("browser.newtabpage.activity-stream.default.sites", "");
 user_pref("browser.newtabpage.activity-stream.telemetry", false);
 // Point the url-classifier to the local testing server for fast failures
-user_pref("browser.safebrowsing.downloads.remote.url", "http://{server}/safebrowsing-dummy/update");
-user_pref("browser.safebrowsing.provider.google.gethashURL", "http://{server}/safebrowsing-dummy/gethash");
-user_pref("browser.safebrowsing.provider.google.updateURL", "http://{server}/safebrowsing-dummy/update");
-user_pref("browser.safebrowsing.provider.google4.gethashURL", "http://{server}/safebrowsing4-dummy/gethash");
-user_pref("browser.safebrowsing.provider.google4.updateURL", "http://{server}/safebrowsing4-dummy/update");
-user_pref("browser.safebrowsing.provider.mozilla.gethashURL", "http://{server}/safebrowsing-dummy/gethash");
-user_pref("browser.safebrowsing.provider.mozilla.updateURL", "http://{server}/safebrowsing-dummy/update");
+user_pref(
+  "browser.safebrowsing.downloads.remote.url",
+  "http://{server}/safebrowsing-dummy/update"
+);
+user_pref(
+  "browser.safebrowsing.provider.google.gethashURL",
+  "http://{server}/safebrowsing-dummy/gethash"
+);
+user_pref(
+  "browser.safebrowsing.provider.google.updateURL",
+  "http://{server}/safebrowsing-dummy/update"
+);
+user_pref(
+  "browser.safebrowsing.provider.google4.gethashURL",
+  "http://{server}/safebrowsing4-dummy/gethash"
+);
+user_pref(
+  "browser.safebrowsing.provider.google4.updateURL",
+  "http://{server}/safebrowsing4-dummy/update"
+);
+user_pref(
+  "browser.safebrowsing.provider.mozilla.gethashURL",
+  "http://{server}/safebrowsing-dummy/gethash"
+);
+user_pref(
+  "browser.safebrowsing.provider.mozilla.updateURL",
+  "http://{server}/safebrowsing-dummy/update"
+);
 user_pref("browser.search.suggest.timeout", 10000); // use a 10s suggestion timeout in tests
 user_pref("browser.shell.checkDefaultBrowser", false);
 user_pref("browser.startup.page", 0); // use about:blank, not browser.startup.homepage
@@ -56,13 +95,25 @@ user_pref("browser.tabs.disableBackgroundZombification", true);
 // Don't use auto-enabled e10s
 user_pref("browser.tabs.remote.autostart", false);
 // Make sure Translation won't hit the network.
-user_pref("browser.translation.bing.authURL", "http://{server}/browser/browser/components/translation/test/bing.sjs");
-user_pref("browser.translation.bing.translateArrayURL", "http://{server}/browser/browser/components/translation/test/bing.sjs");
+user_pref(
+  "browser.translation.bing.authURL",
+  "http://{server}/browser/browser/components/translation/test/bing.sjs"
+);
+user_pref(
+  "browser.translation.bing.translateArrayURL",
+  "http://{server}/browser/browser/components/translation/test/bing.sjs"
+);
 user_pref("browser.translation.engine", "Bing");
-user_pref("browser.translation.yandex.translateURLOverride", "http://{server}/browser/browser/components/translation/test/yandex.sjs");
+user_pref(
+  "browser.translation.yandex.translateURLOverride",
+  "http://{server}/browser/browser/components/translation/test/yandex.sjs"
+);
 user_pref("browser.ui.layout.tablet", 0); // force tablet UI off
 // Ensure UITour won't hit the network
-user_pref("browser.uitour.pinnedTabUrl", "http://{server}/uitour-dummy/pinnedTab");
+user_pref(
+  "browser.uitour.pinnedTabUrl",
+  "http://{server}/uitour-dummy/pinnedTab"
+);
 user_pref("browser.uitour.url", "http://{server}/uitour-dummy/tour");
 // Turn off Merino suggestions in the location bar so as not to trigger network
 // connections.
@@ -77,12 +128,18 @@ user_pref("browser.fixup.domainsuffixwhitelist.test", true);
 user_pref("browser.warnOnQuit", false);
 // Enable webapps testing mode, which bypasses native installation.
 user_pref("browser.webapps.testing", true);
-user_pref("captivedetect.canonicalURL", "http://{server}/captive-detect/success.txt");
+user_pref(
+  "captivedetect.canonicalURL",
+  "http://{server}/captive-detect/success.txt"
+);
 // Enable android logcat for better diagnostics on beta/release
 user_pref("consoleservice.logcat", true);
 // Point Firefox Health Report at a local server. We don't care if it actually
 // works. It just can't hit the default production endpoint.
-user_pref("datareporting.healthreport.documentServerURI", "http://{server}/healthreport/");
+user_pref(
+  "datareporting.healthreport.documentServerURI",
+  "http://{server}/healthreport/"
+);
 user_pref("datareporting.healthreport.uploadEnabled", false);
 user_pref("devtools.browsertoolbox.panel", "jsdebugger");
 user_pref("devtools.debugger.remote-port", 6023);
@@ -106,25 +163,49 @@ user_pref("dom.successive_dialog_time_limit", 0);
 // use an additional pref here to allow automation to use the "normal" behavior.
 user_pref("dom.use_xbl_scopes_for_remote_xul", true);
 user_pref("extensions.autoDisableScopes", 0);
-user_pref("extensions.blocklist.detailsURL", "http://{server}/extensions-dummy/blocklistDetailsURL");
-user_pref("extensions.blocklist.itemURL", "http://{server}/extensions-dummy/blocklistItemURL");
+user_pref(
+  "extensions.blocklist.detailsURL",
+  "http://{server}/extensions-dummy/blocklistDetailsURL"
+);
+user_pref(
+  "extensions.blocklist.itemURL",
+  "http://{server}/extensions-dummy/blocklistItemURL"
+);
 // XPI extensions are required for test harnesses to load
 user_pref("extensions.defaultProviders.enabled", true);
 // Disable metadata caching for installed add-ons by default
 user_pref("extensions.getAddons.cache.enabled", false);
 // Make sure AddonRepository won't hit the network
-user_pref("extensions.getAddons.get.url", "http://{server}/extensions-dummy/repositoryGetURL");
-user_pref("extensions.getAddons.search.browseURL", "http://{server}/extensions-dummy/repositoryBrowseURL");
-user_pref("extensions.hotfix.url", "http://{server}/extensions-dummy/hotfixURL");
+user_pref(
+  "extensions.getAddons.get.url",
+  "http://{server}/extensions-dummy/repositoryGetURL"
+);
+user_pref(
+  "extensions.getAddons.search.browseURL",
+  "http://{server}/extensions-dummy/repositoryBrowseURL"
+);
+user_pref(
+  "extensions.hotfix.url",
+  "http://{server}/extensions-dummy/hotfixURL"
+);
 // Disable intalling any distribution add-ons
 user_pref("extensions.installDistroAddons", false);
 // Disable Screenshots by default for now
 user_pref("extensions.screenshots.disabled", true);
-user_pref("extensions.systemAddon.update.url", "http://{server}/dummy-system-addons.xml");
+user_pref(
+  "extensions.systemAddon.update.url",
+  "http://{server}/dummy-system-addons.xml"
+);
 user_pref("extensions.systemAddon.update.enabled", false);
-user_pref("extensions.update.background.url", "http://{server}/extensions-dummy/updateBackgroundURL");
+user_pref(
+  "extensions.update.background.url",
+  "http://{server}/extensions-dummy/updateBackgroundURL"
+);
 // Point update checks to the local testing server for fast failures
-user_pref("extensions.update.url", "http://{server}/extensions-dummy/updateURL");
+user_pref(
+  "extensions.update.url",
+  "http://{server}/extensions-dummy/updateURL"
+);
 user_pref("findbar.highlightAll", false);
 user_pref("findbar.modalHighlight", false);
 // Existing tests assume there is no font size inflation.
@@ -137,7 +218,10 @@ user_pref("geo.provider.testing", true);
 user_pref("geo.provider.network.logging.enabled", true);
 user_pref("geo.provider.network.scan", false);
 user_pref("geo.provider.network.timeToWaitBeforeSending", 2000);
-user_pref("geo.provider.network.url", "http://{server}/tests/dom/tests/mochitest/geolocation/network_geolocation.sjs");
+user_pref(
+  "geo.provider.network.url",
+  "http://{server}/tests/dom/tests/mochitest/geolocation/network_geolocation.sjs"
+);
 user_pref("gfx.color_management.force_srgb", true);
 user_pref("gfx.logging.level", 1);
 // We don't want to hit the real Firefox Accounts server for tests.  We don't
@@ -157,7 +241,10 @@ user_pref("media.dormant-on-pause-timeout-ms", 0); // Enter dormant immediately
 // to send decoded video frames from the CDM to Gecko.
 user_pref("media.eme.chromium-api.video-shmems", 0);
 // Make sure GMPInstallManager won't hit the network.
-user_pref("media.gmp-manager.url.override", "http://{server}/dummy-gmp-manager.xml");
+user_pref(
+  "media.gmp-manager.url.override",
+  "http://{server}/dummy-gmp-manager.xml"
+);
 user_pref("media.hls.server.url", "http://{server}/tests/dom/media/test/hls");
 // Don't block old libavcodec libraries when testing, because our test systems
 // cannot easily be upgraded.
@@ -188,7 +275,10 @@ user_pref("network.sntp.pools", "{server}");
 // relatively long time which may cause unnecessary intermittents and slow down
 // tests. This, like many things, will stop working correctly in 2038.
 user_pref("places.database.lastMaintenance", 2147483647);
-user_pref("privacy.trackingprotection.introURL", "http://{server}/trackingprotection/tour");
+user_pref(
+  "privacy.trackingprotection.introURL",
+  "http://{server}/trackingprotection/tour"
+);
 // Disable all recommended Remote Protocol preferences for Gecko tests.
 // The prefs recommended by Remote Protocol are typically geared towards
 // consumer automation; not vendor testing.
@@ -238,4 +328,3 @@ user_pref("security.data_uri.block_toplevel_data_uri_navigations", false);
 
 // We use data: to tell the Quitter extension to quit.
 user_pref("security.data_uri.block_toplevel_data_uri_navigations", false);
-
diff --git a/testing/profiles/web-platform/user.js b/testing/profiles/web-platform/user.js
index 32c0daf71193..f59331e32c37 100644
--- a/testing/profiles/web-platform/user.js
+++ b/testing/profiles/web-platform/user.js
@@ -55,7 +55,7 @@ user_pref("dom.disable_beforeunload", true);
 // function assumes this is available.
 user_pref("dom.animations-api.implicit-keyframes.enabled", true);
 // Disable high DPI
-user_pref("layout.css.devPixelsPerPx", "1.0")
+user_pref("layout.css.devPixelsPerPx", "1.0");
 // sometime wpt runs test even before the document becomes visible, which would
 // delay video.play() and cause play() running in wrong order.
 user_pref("media.block-autoplay-until-in-foreground", false);
@@ -80,7 +80,10 @@ user_pref("layout.css.font-loading-api.workers.enabled", true);
 // Enable WebDriver BiDi experimental commands and events during tests.
 user_pref("remote.experimental.enabled", true);
 // Disable always partitioning storage with the Storage Access API
-user_pref("privacy.partition.always_partition_third_party_non_cookie_storage", false);
+user_pref(
+  "privacy.partition.always_partition_third_party_non_cookie_storage",
+  false
+);
 // Disable OCSP checks in WPT (webtransport triggers these occasionally)
 user_pref("security.OCSP.enabled", 0);
 // Disable prefers-reduced-motion to ensure that smooth scrolls can be tested.
diff --git a/testing/profiles/xpcshell/user.js b/testing/profiles/xpcshell/user.js
index 52ccde6bfc77..49cd47cd972e 100644
--- a/testing/profiles/xpcshell/user.js
+++ b/testing/profiles/xpcshell/user.js
@@ -6,8 +6,14 @@
 /* globals user_pref */
 /* eslint quotes: 0 */
 user_pref("app.normandy.api_url", "https://%(server)s/selfsupport-dummy/");
-user_pref("browser.safebrowsing.downloads.remote.url", "https://%(server)s/safebrowsing-dummy");
-user_pref("extensions.systemAddon.update.url", "http://%(server)s/dummy-system-addons.xml");
+user_pref(
+  "browser.safebrowsing.downloads.remote.url",
+  "https://%(server)s/safebrowsing-dummy"
+);
+user_pref(
+  "extensions.systemAddon.update.url",
+  "http://%(server)s/dummy-system-addons.xml"
+);
 // Treat WebExtension API/schema warnings as errors.
 user_pref("extensions.webextensions.warnings-as-errors", true);
 // Always use network provider for geolocation tests
@@ -16,7 +22,10 @@ user_pref("geo.provider.testing", true);
 user_pref("browser.region.network.url", "");
 user_pref("geo.provider.network.compare.url", "");
 user_pref("media.gmp-manager.updateEnabled", false);
-user_pref("media.gmp-manager.url.override", "http://%(server)s/dummy-gmp-manager.xml");
+user_pref(
+  "media.gmp-manager.url.override",
+  "http://%(server)s/dummy-gmp-manager.xml"
+);
 user_pref("toolkit.telemetry.server", "https://%(server)s/telemetry-dummy");
 user_pref("telemetry.fog.test.localhost_port", -1);
 // Prevent Remote Settings to issue non local connections.