Why does Firefox sometimes cache my CSS & Javascript code, even though it has changed?

Question

On my product site, Firefox sometimes \"doesnt detect\" changes in my CSS & Javascript code. Rather it loads the old versions, so it seems that I need to clear the cache

Answer 1

Just gotta clear the cache or hard refresh (Ctrl+F5) I'm afraid.

Another option is to simply change the file name of the JS or CSS file so that FF doesn't recognize it as a cached file (e.g. rename style.css to style2.css).