Remove Stock Prices and focus on the only important metric: Company Valuation
This extension will help you with the purpose of finding good investments. Just visit Yahoo Finance with this extension and you will notice that the current market Valuation shows in big bold letter and that the stock price is hidden, gone forever.
Why?... Stock prices don't matter at all for real investors. The number that matters is Intrinsic Value when compared to Market Valuation.
This extension will help you eliminate the noise. If you know that you will pay X amount for a company, you don't need to see the stock price going up or down every second... You only need to focus on the Market Valuation variation and wait patiently until there is a good enough margin of safety to enter.