Chrome doesn't watch videos online, you do
Java works in Safari just fine, I've been using it over and over again for years. Update Java.
Chrome does support flash, you might want to reinstall it from the Adobe website if you're experiencing problems.
Every web browser has auto-complete history, even IE. If you're too bothered with setting up a stable version of Firefox, you will find that it takes the same amount of time to set up Chrome with extensions (many of which are available for both browsers).