Expedia doesn't render properly in Firefox - some of the sections are missing, but it's not immediately obvious what is missing. It took me a while to figure out why my wife kept having problems with that site, and I had to move her to Chrome to allow her to use it.

I continue to use Firefox because I know when to suspect a website problem might be the browser, but she doesn't have the ability to analyze a situation like this. I have this conundrum with other family members that I support. I want them to use Firefox, but I hate to have them run into an issue because of the browser I recommended.