The latest version of Firefox appears to have updated a setting: When selecting a custom search engine in the address bar or search box, you now need to click the mouse three times (click the dropdown button on the left side of the box - select search engine - search); previously, after entering search terms in the search box, you only needed to move the mouse icon below the box to automatically display all search engines, and then click the desired engine to search directly, thus completing the search with just one click. The old setting was very convenient; while the new setting forces me to click several times every time I want to search for a term in the search bar. I hope the support team will address and improve this issue.