tests: do some adjustments fixing the firefox crash under wayland

firefox-theme/default/user.js

@@ -45,3 +45,7 @@ user_pref("datareporting.healthreport.uploadEnabled", false);
 user_pref("datareporting.policy.dataSubmissionEnabled", false);
 user_pref("toolkit.telemetry.unified", false);
 user_pref("trailhead.firstrun.didSeeAboutWelcome", true);
+
+// Disable hardware acceleration, we are doomed - firefox crashed under wayland
+user_pref("browser.preferences.defaultPerformanceSettings.enabled", false);
+user_pref("layers.acceleration.disabled", true);

test/machine_install.py

@@ -147,7 +147,7 @@ def start(self):
                 f"{boot_arg} "
                 f"--name {self.label} "
                 f"--os-variant=detect=on "
-                "--memory 4096 "
+                "--memory 4096 --vcpus 4 "
                 "--noautoconsole "
                 f"--graphics vnc,listen={self.ssh_address} "
                 "--extra-args "

test/run

@@ -35,9 +35,7 @@ esac
 # test runs in kernel_t context and triggers massive amounts of SELinux
 # denials; SELinux gets disabled, but would still trigger unexpected messages
 # we create huge VMs, so we need to reduce parallelism on CI
-if [ -z "${TEST_JOBS-}" ]; then
-  TEST_JOBS=4
-fi
+TEST_JOBS=4
 if [ -z "${TEST_OS-}" ]; then
   TEST_OS=fedora-rawhide-boot
 fi