1 files changed, 43 insertions, 0 deletions
diff --git a/toolkit/components/backgroundtasks/defaults/backgroundtasks.js b/toolkit/components/backgroundtasks/defaults/backgroundtasks.js
new file mode 100644
index 0000000000..297cdce5b9
--- /dev/null
+++ b/toolkit/components/backgroundtasks/defaults/backgroundtasks.js
@@ -0,0 +1,43 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// These preferences override Gecko preferences in `greprefs.js`.  Use
+// `backgroundtasks_browser.js` to override browser/-specific preferences in
+// `firefox.js`.
+
+pref("browser.dom.window.dump.enabled", true);
+pref("devtools.console.stdout.chrome", true);
+
+pref("browser.cache.offline.enable", false);
+pref("browser.cache.disk.enable", false);
+pref("permissions.memory_only", true);
+
+// For testing only: used to test that backgroundtask-specific prefs are
+// processed.  This just needs to be an unusual integer in the range 0..127.
+pref("test.backgroundtask_specific_pref.exitCode", 79);
+
+// Enable the browser toolbox by default.  The browser toolbox is available only
+// when launching the background task with `--jsdebugger` on the command line,
+// and an attacker who can launch background task processes with arbitrary
+// parameters and execution environment can already access this functionality,
+// so there's no need to restrict access via preferences.
+pref("devtools.chrome.enabled", true);
+pref("devtools.debugger.remote-enabled", true);
+pref("devtools.debugger.prompt-connection", false);
+
+// Background tasks do not persist the cookie database: they should
+// not be using cookies for network requests.
+pref("network.cookie.noPersistentStorage", true);
+
+// Background tasks don't need to worry about perceived performance. We disable
+// fast shutdown to reduce the risk of open file handles preventing cleanup of
+// the ephemeral profile directory.
+pref("toolkit.shutdown.fastShutdownStage", 0);
+
+// Avoid a race between initializing font lists and rapid shutdown,
+// particularly on macOS.  Compare Bug 1777332.
+pref("gfx.font-list-omt.enabled", false);
+
+// Prevent key#.db and cert#.db from being created in the ephemeral profile.
+pref("security.nocertdb", true);