Bug 1743714 - Set fission defaults in each test's profile settings, r…

…=ahal,perftest-reviewers,sparky

This excludes web-platform-tests which will be handled later in the commit series.
Not using the base profile for everything allows us to migrate the suite-specific
fission handling one suite at a time.

Differential Revision: https://phabricator.services.mozilla.com/D132767

testing/profiles/base/user.js

@@ -4,8 +4,3 @@
 
 // This is useful for testing a pref on try.
 /* globals user_pref */
-
-// Explicitly turn off fission so we don't accidentally use the wrong default
-// value. This can be removed once harnesses and tasks assume fission by
-// default.
-user_pref("fission.autostart", false);

testing/profiles/geckoview-junit/user.js

@@ -8,3 +8,8 @@
 
 // Always run in e10s
 user_pref("browser.tabs.remote.autostart", true);
+
+// Explicitly turn off fission so we don't accidentally use the wrong default
+// value. This can be removed once harnesses and tasks assume fission by
+// default.
+user_pref("fission.autostart", false);

testing/profiles/mochitest/user.js

@@ -14,3 +14,8 @@ user_pref("browser.sessionstore.resume_from_crash", false);
 // is suppressed, synthetic click events and co. go to the old page, which can
 // be confusing for tests that send click events before the first paint.
 user_pref("nglayout.initialpaint.unsuppress_with_no_background", true);
+
+// Explicitly turn off fission so we don't accidentally use the wrong default
+// value. This can be removed once harnesses and tasks assume fission by
+// default.
+user_pref("fission.autostart", false);

testing/profiles/perf/user.js

@@ -95,3 +95,7 @@ user_pref("startup.homepage_welcome_url.additional", "");
 // tests (bug 1725270). Can be removed once non-about:blank intermediate pages
 // are used instead (bug 1724261).
 user_pref("browser.tabs.remote.systemTriggeredAboutBlankAnywhere", true);
+// Explicitly turn off fission so we don't accidentally use the wrong default
+// value. This can be removed once harnesses and tasks assume fission by
+// default.
+user_pref("fission.autostart", false);

testing/profiles/profileserver/user.js

@@ -6,3 +6,8 @@
 /* globals user_pref */
 // Turn off budget throttling for the profile server
 user_pref("dom.timeout.enable_budget_timer_throttling", false);
+
+// Explicitly turn off fission so we don't accidentally use the wrong default
+// value. This can be removed once harnesses and tasks assume fission by
+// default.
+user_pref("fission.autostart", false);

testing/profiles/raptor/user.js

@@ -44,6 +44,11 @@ user_pref('datareporting.healthreport.uploadEnabled', false);
 // https://bugzilla.mozilla.org/show_bug.cgi?id=1706180
 user_pref('toolkit.telemetry.initDelay', 99999999);
 
+// Explicitly turn off fission so we don't accidentally use the wrong default
+// value. This can be removed once harnesses and tasks assume fission by
+// default.
+user_pref("fission.autostart", false);
+
 // disable autoplay for raptor tests
 user_pref('media.autoplay.default', 5);
 user_pref('media.autoplay.ask-permission', true);

testing/profiles/reftest/user.js

@@ -100,3 +100,7 @@ user_pref("toolkit.telemetry.initDelay", 99999999);
 user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);
 // Use a light color-scheme unless explicitly overriden.
 user_pref("layout.css.prefers-color-scheme.content-override", 1);
+// Explicitly turn off fission so we don't accidentally use the wrong default
+// value. This can be removed once harnesses and tasks assume fission by
+// default.
+user_pref("fission.autostart", false);

testing/profiles/xpcshell/user.js

@@ -36,3 +36,7 @@ user_pref("gfx.color_management.force_srgb", true);
 user_pref("gfx.color_management.mode", 1);
 // Don't enable remote tiles on new-tab pages in xpcshell
 user_pref("browser.topsites.contile.enabled", false);
+// Explicitly turn off fission so we don't accidentally use the wrong default
+// value. This can be removed once harnesses and tasks assume fission by
+// default.
+user_pref("fission.autostart", false);