It appears you are using Firefox 113.0 on a unnamed Linux distro. Mozilla only provides updates to their official builds of Firefox for Windows, macOS, and Linux from say https://www.mozilla.org/firefox/all/desktop-release/ If you are using a Firefox package installed in your package manager then you have not done updates or your version of Linux distro is no longer supported with package updates including Firefox packages. So either you need to update your Linux distro, find a repository that supports your older Linux distro with Firefox package updates or use the Firefox tarballs from Mozilla which does get internal Firefox updates. Depending on your distro you also may have the option of Snap or Flatpak versions of Firefox though these have their downsides. https://support.mozilla.org/en-US/kb/install-firefox-linux