I set Firefox as my browser but it's still using google

Go to menu -> Settings -> Search, you can set whatever you want as default search engine.

Hi, Thank you. It shows Firefox as my default browser in my settings. I think this may be because I have an Android phone. When I bring up the browser at the bottom it says This time search with and there's a drop down menu which shows, Google, Bing, DuckDuckGo and several others without the option of Firefox. It looks like I'm on a Firefox browser but the only search bar is that one.

See also https://support.mozilla.org/en-US/kb/manage-my-default-search-engines-firefox-android on how to deal with search engines in the Firefox for Android web browser.