Bug 1876608 - register autoOpen feature flag in Nimbus and set pref to false by default. r=shopping-reviewers,jhirsch

Differential Revision: https://phabricator.services.mozilla.com/D200040

browser/app/profile/firefox.js

@@ -785,7 +785,7 @@ pref("browser.shopping.experience2023.survey.pdpVisits", 0);
 // Enables the auto-open feature for the shopping sidebar,
 // including new callouts and settings UI changes
 // (this is just the feature flag).
-pref("browser.shopping.experience2023.autoOpen.enabled", true);
+pref("browser.shopping.experience2023.autoOpen.enabled", false);
 
 // Opens the shopping sidebar automatically when viewing a PDP.
 pref("browser.shopping.experience2023.autoOpen.userEnabled", true);

toolkit/components/nimbus/FeatureManifest.yaml

@@ -1973,6 +1973,12 @@ shopping2023:
       description: True if showing survey is enabled
       type: boolean
       fallbackPref: browser.shopping.experience2023.survey.enabled
+    autoOpenEnabled:
+      description: True if auto-open behavior for the sidebar is enabled
+      type: boolean
+      setPref:
+        branch: default
+        pref: browser.shopping.experience2023.autoOpen.enabled
 
 shoppingOHTTP:
   description: Prefs to control the OHTTP URLs used for shopping.