Firefox 113.0.2 is such a specific version that leads me to think your version of Ubuntu distro is eol in package updates just like certain versions of Linux Mate did with the Firefox 113 version. If so then you need to update to a current supported version of Ubuntu or another Linux distro that still supports the old 32-bit CPU's or at very least you can use the Linux tarball version of Firefox from Mozilla. The 32-bit Linux version of Firefox 140.6.0esr https://www.firefox.com/download/all/desktop-esr/linux/ You need to make sure the Firefox folder you have the untarred contents in has read/write permissions for the user account so you can then get internal Firefox updates from Mozilla. An easy way is to have Firefox folder in /Home. However once updates for Firefox 140 ESR ends that will be it. Firefox 145.0 and later dropped 32-bit Linux support. https://support.mozilla.org/en-US/kb/install-firefox-linux https://support.mozilla.org/en-US/kb/firefox-has-ended-support-32-bit-linux