diff --git a/docs/TESTPLAN.md b/docs/TESTPLAN.md
index 980addb..e83cbc8 100644
--- a/docs/TESTPLAN.md
+++ b/docs/TESTPLAN.md
@@ -27,7 +27,7 @@
 
 - (Create profile: <https://developer.mozilla.org/Firefox/Multiple_profiles>, or via some other method)
 - Navigate to _about:config_ and set the following preferences. (If a preference does not exist, create it be right-clicking in the white area and selecting New -> String)
-- Set `shieldStudy.logLevel` to `All`. This permits shield-add-on log output in browser console.
+- Set `shieldStudy.logLevel` to `info`. This permits shield-add-on log output in browser console.
 - Go to [this study's tracking bug](https://bugzilla.mozilla.org/show_bug.cgi?id=1496154) and install the latest add-on zip file
 
 ## Expected User Experience / Functionality
@@ -40,6 +40,7 @@ Ordinary regression tests.
 
 ### Note: checking "sent Telemetry is correct"
 
+- Set `shieldStudy.logLevel` to `all`. This permits debug-level shield-add-on log output in the browser console. Note that this will negatively affect the performance of Firefox.
 - Open the Browser Console using Firefox's top menu at `Tools > Web Developer > Browser Console`. This will display Shield (loading/telemetry) log output from the add-on.
 
 See [TELEMETRY.md](./TELEMETRY.md) for more details on what pings are sent by this add-on.
diff --git a/run-firefox.js b/run-firefox.js
index debcc2f..8c9682c 100644
--- a/run-firefox.js
+++ b/run-firefox.js
@@ -7,19 +7,25 @@ process.on("unhandledRejection", r => console.error(r)); // eslint-disable-line
 const utils = require("./test/functional/utils");
 
 const STUDY_TYPE = process.env.STUDY_TYPE || "pioneer";
+const LOG_LEVEL = process.env.LOG_LEVEL || "info";
 
-const run = async studyType => {
+const run = async (studyType, shieldStudyLogLevel) => {
   const driver = await utils.setupWebdriver.promiseSetupDriver(
     utils.FIREFOX_PREFERENCES,
   );
   const widgetId = utils.ui.makeWidgetId(
-    "shield-utils-test-addon@shield.mozilla.org",
+    "jestr-pioneer-shield-study@pioneer.mozilla.org",
   );
   await utils.preferences.set(
     driver,
     `extensions.${widgetId}.test.studyType`,
     studyType,
   );
+  await utils.preferences.set(
+    driver,
+    `shieldStudy.logLevel`,
+    shieldStudyLogLevel,
+  );
   if (studyType === "pioneer") {
     await utils.setupWebdriver.installPioneerOptInAddon(driver);
   }
@@ -30,4 +36,4 @@ const run = async studyType => {
   driver.quit();
 };
 
-run(STUDY_TYPE);
+run(STUDY_TYPE, LOG_LEVEL);