Your Firefox version on Linux appears to be the old Firefox 113.0.2 when I believe the WhatsApp web site says it works with Firefox 115+. If you are using a package build installed in your package manager and there are no more updates in yor package manager then perhaps your version of Linux distro is no longer supported with package updates. You either need to update to a currently supported version of your Linux distro or another one or use the Firefox Linux tarballs from Mozilla as they get internal Firefox updates like the macOS and Windows versions. Just make sure wherever you put the tarball version has read/write permissions on the folder for the user to get updates as a easy way is to have folder in Home. https://support.mozilla.org/en-US/kb/install-firefox-linux https://www.firefox.com/download/all/desktop-release/ (Firefox 145.0 Release) https://www.firefox.com/download/all/desktop-esr/ (Firefox 140.5.0esr) Though if you have 32-bit Linux then use the Firefox 140 ESR as 32-bit Linux support is dropped as of Firefox 145.0 and later.