henry pushed to branch tor-browser-147.0a1-16.0-2 at The Tor Project / Applications / Tor Browser Commits: 2cccadc1 by Henry Wilkes at 2026-02-10T11:49:42+00:00 fixup! Firefox preference overrides. TB 44520: Disable Normandy rollout. This preference is added in Firefox 149 from bugzilla bug 2003350. - - - - - 7d6331a5 by Henry Wilkes at 2026-02-10T11:49:42+00:00 BB 44520: Disable Experiment API (Firefox Labs). - - - - - 2 changed files: - browser/app/profile/001-base-profile.js - toolkit/components/nimbus/ExperimentAPI.sys.mjs Changes: ===================================== browser/app/profile/001-base-profile.js ===================================== @@ -417,6 +417,9 @@ pref("browser.urlbar.dnsResolveSingleWordsAfterSearch", 0); pref("messaging-system.rsexperimentloader.enabled", false); // true means that you are *not* opting out. See its usage in various file. pref("app.shield.optoutstudies.enabled", false); +// Disable nimbus rollouts. +// See bugzilla bug 2003350. See tor-browser#44520. +pref("nimbus.rollouts.enabled", false); // Disable Normandy/Shield pref("app.normandy.enabled", false); pref("app.normandy.api_url", ""); ===================================== toolkit/components/nimbus/ExperimentAPI.sys.mjs ===================================== @@ -396,10 +396,19 @@ export const ExperimentAPI = new (class { } get enabled() { + if (AppConstants.BASE_BROWSER_VERSION) { + // Do not allow ExperimentsAPI (which covers either "labs", "studies" or + // "rollouts") in Base Browser. + return false; + } return this.studiesEnabled || this.labsEnabled; } get labsEnabled() { + if (AppConstants.BASE_BROWSER_VERSION) { + // Do not allow "Firefox Labs" in Base Browser. + return false; + } return Services.policies.isAllowed("FirefoxLabs"); } View it on GitLab: https://gitlab.torproject.org/tpo/applications/tor-browser/-/compare/7359f9f... -- View it on GitLab: https://gitlab.torproject.org/tpo/applications/tor-browser/-/compare/7359f9f... You're receiving this email because of your account on gitlab.torproject.org.