A couple of quick questions to help me troubleshoot:
- Does this happen after any specific action, like closing the app from the app switcher, or after switching to another app and returning later?
- Have you updated to the latest iOS version, and is Firefox updated to the latest build you can install?
- Do other settings (like bookmarks or saved tabs) persist between sessions, or is it just the default search engine?
In the meantime, here are a few steps you can try that often resolve iOS restore issues:
- Check that the new default search engine is selected under Settings > Search > Default Search Engine in Firefox.
- Clear cache for Firefox (Settings > Firefox > Clear Private Data? or Clear Cache if available) and then reselect the default search engine.
- Sign out of Firefox Account and sign back in to ensure your preferences sync correctly.
- If you rely on Firefox Sync, ensure that sync is enabled and that you’re not accidentally restoring from a local profile that has the original default.
If the issue persists, I can help draft a precise bug report you can share with Mozilla, including:
- App version: Firefox 144.3
- iOS version
- Steps to reproduce
- Expected behavior vs. actual behavior
