You can also try setting your screen resolution to a higher setting.
You do that by right-clicking on your desktop and choosing the tab to the far right.
Since you are running a RocketDock aswell I suspect your computer can handle a bigger resolution, and your screen seems to support it.
Alot of websites are configured to work best with the 1024x768 resolution, and more now are made to have 1280x1024 as their "best".
Increasing your screen resolution is just a suggestion however, it's not needed.
As stated previously, you can hold Ctrl and scroll your mouse wheel to zoom in and out.