After updating Firefox yesterday, I made an error with some css code and Firefox immediately picked it up (very helpful). After correcting the error, Firefox continues to show the error unless I validate the page and then re-open with Firefox. The same error is shown for every page in my local folder regardless of the fact that the error was never made on those pages. Is this new with the update, or am I unaware of a simple reset procedure? CSS Error: Unexpected end of file while searching for closing } of invalid rule set. My operating system is Windows 7. The problem not an issue for me unless I need to learn something about using Firefox.