I recently talked to a friend who very pissed off with the font size of a website. He was surprised when I showed him that the web browsers (whether is Firefox, Internet Explorer or Google Chrome) in fact already have the build-in feature to allow you to zoom-in and zoom-out from a web page. I'm not sure about Safari but I suspect it should have a similar feature.
How to Zoom In and Zoom Out?
- Zoom-In: Press and Hold "Ctrl" & "+" button or Press "Ctrl" & move "Mouse wheel Up"
- Zoom-Out: Press and Hold "Ctrl" & "-" button or Press "Ctrl" & move "Mouse wheel Down"
Hope this helps. It used to require to install plug-in to use this feature and now no longer needed anymore. :)