Two issues: 1. Tabs lock-up until browser is restarted 2. Typing in search bar causes search bar and tabs to disappear

I'm having a couple issues with the browser.

On Windows 7 Enterprise machine

1. Idle tabs become unresponsive after a period of time. To be able to access them I have to close and restart or force close and restart the browser, at which point they become selectable/responsive again.

2. When typing more than 1 or two characters directly into the address bar, the window will frequently hide the address bar and tabs. I've found I can get them to reappear eventually by repeatedly Ctrl-Tab, Ctrl-Alt-Tabbing back and forth. If that doesn't work, I have to close or force close and restart.

Any advice on what I'm doing wrong/how to prevent this from happening?