diff --git a/browser/components/sessionstore/test/browser.toml b/browser/components/sessionstore/test/browser.toml
index c7b19a08e8c4..bba3bb11347a 100644
--- a/browser/components/sessionstore/test/browser.toml
+++ b/browser/components/sessionstore/test/browser.toml
@@ -37,6 +37,8 @@ prefs = [
   "gfx.font_rendering.fallback.async=false",
   "browser.sessionstore.closedTabsFromAllWindows=true",
   "browser.sessionstore.closedTabsFromClosedWindows=true",
+  # Override the test default, allowing the session restore infobar to be shown if necessary
+  "browser.startup.couldRestoreSession.count=0",
 ]
 
 ["browser_aboutPrivateBrowsing.js"]
diff --git a/testing/profiles/base/user.js b/testing/profiles/base/user.js
index 8cd26eddb2e1..2369a0b05ca8 100644
--- a/testing/profiles/base/user.js
+++ b/testing/profiles/base/user.js
@@ -13,4 +13,8 @@ user_pref("dom.input_events.security.minTimeElapsedInMS", 0);
 user_pref("extensions.formautofill.addresses.experiments.enabled", true);
 
 // Turn off update
-user_pref("app.update.disabledForTesting", true);
\ No newline at end of file
+user_pref("app.update.disabledForTesting", true);
+
+// Browser restarts can cause the session restore suggestion to be shown when reusing a
+// profile across a set of tests. Avoid showing this infobar by default.
+user_pref("browser.startup.couldRestoreSession.count", -1);
\ No newline at end of file
diff --git a/testing/profiles/perf/user.js b/testing/profiles/perf/user.js
index b0f32c08fc3a..f0e493dd1a87 100644
--- a/testing/profiles/perf/user.js
+++ b/testing/profiles/perf/user.js
@@ -32,7 +32,6 @@ user_pref("browser.safebrowsing.provider.google4.updateURL", "http://127.0.0.1/s
 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.warnOnQuit", false);
 user_pref("datareporting.healthreport.documentServerURI", "http://127.0.0.1/healthreport/");
 user_pref("devtools.chrome.enabled", false);
diff --git a/testing/profiles/web-platform/user.js b/testing/profiles/web-platform/user.js
index 843d1492b0d5..e50aabc01904 100644
--- a/testing/profiles/web-platform/user.js
+++ b/testing/profiles/web-platform/user.js
@@ -8,8 +8,6 @@
 user_pref("browser.newtabpage.enabled", false);
 // Don't restore the last open set of tabs if the browser has crashed
 user_pref("browser.sessionstore.resume_from_crash", false);
-//  Disable session restore infobar.
-user_pref("browser.startup.couldRestoreSession.count", -1);
 // Don't show the Bookmarks Toolbar on any tab (the above pref that
 // disables the New Tab Page ends up showing the toolbar on about:blank).
 user_pref("browser.toolbars.bookmarks.visibility", "never");