Do you mean searching on internet via Google or searching on a web page via the Find bar (Ctrl+F)?

Searching the email. When i type in the keywords, it looks like it's searching, but the results are always the same - nothing found. I've used this function many times daily, I have an enormous amount of emails saved. Thanks...

Sorry, that doesn't sound like a Firefox support issue. What are you using for email?

Using Yahoo, have been for years and it wasn't until the new 7.0.1 release install that it stopped working.