Once you're there, the site will check if all your plugins have the latest versions.
If you see plugins in the list that have a yellow Update button or a red Update now button, please update these immediately.
To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.
Re: Some websites that I frequent are broken on Firefox yet work right on Chrome.
As suggested by you I have checked my browser for the required plugins. I'd like to send you the screenshots as requested by you but as I am a little inexperienced yet in using this site, a personal email ID or community email ID to which I can send the aforementioned screenshots would be a boon tome.