Hey, To check for new updates, you should click on the three lines (upper right corner), open '''Settings''', and scroll down until you see the "'''Firefox Updates'''" section (almost at the bottom). There, you can see your current version. Click "'''Check for updates'''". If there is a newer version available, wait for it to download, and then click "'''Restart to Update'''". If you have any doubts, check [https://support.mozilla.org/en-US/kb/update-firefox-latest-release?redirectslug=update-firefox-latest-version&redirectlocale=en-US this link] for an alternative method. Note that the latest version available when I wrote this was the 147.0.1.

Firefox 147.0.1 released on January 16 is the current Release. https://www.firefox.com/firefox/147.0.1/releasenotes/