my firefox focus does not display the searchresult but screen showing it crashed.

If Firefox Focus is showing a crash screen instead of displaying the search results it may be caused by a corrupted app cache an outdated version or a temporary app issue. Try updating Firefox Focus first then restart your device. If the problem continues clear the app’s cache/data (if your device provides that option) or reinstall Firefox Focus. Also check whether the issue happens with every search or only with a particular website/search engine. If you can share a screenshot of the crash screen, it may help identify the problem.