To update Firefox, click the Menu > Help > About Firefox.

Firefox will automatically check for download and install any available update.

For more info see Update Firefox to the latest release

Hello

According to your subject title.

Take a look at https://www.firefox.com/en-US/releases 115.29.0,this is the latest version, currently.

115.29.0, is it your latest version.

For information purposes. Upcoming ESR releases https://whattrainisitnow.com/release/?version=esr

A similar question, https://support.mozilla.org/en-US/questions/1544079

how updated fire fox letest version

You appear to be using the latest version you can run on the old eol Windows 7 which is Firefox 115 ESR currently at 115.29.0esr. The last planned update will be Firefox 115.33.0esr next year unless Mozilla extends updates again. Firefox 116.0 and later requires Windows 10, 11.

https://support.mozilla.org/en-US/kb/firefox-users-windows-7-8-and-81-moving-extended-support