Firefox 118.0.2 is current, so that would be okay. *https://www.mozilla.org/en-US/firefox/118.0.2/releasenotes/ An error message about XPCOM missing or about platform version usually happens because of a failed Firefox update that left you with a mixture of old and updated files in the Firefox program folder. This can happen in case security software was keeping a handle of some of the files in the Firefox program folder preventing Firefox from replacing all the files. You need to do a clean reinstall and remove the Firefox program folder to ensure that all files are replaced. You may have to disable security software temporarily in case the problem persists. *https://www.mozilla.org/en-US/firefox/all/#product-desktop-release