Quote Originally Posted by Nikpalj
I love that same feature in Opera (which has proven to be one of the most important ones for me, because it's so time and nerve saving overtime), I also much appreciate it's acrobat reader-like ability to zoom in the net pages.

This has proven to be a lifesaver time and again because I'm so freaking shortsighted. I'd recommend people with large dyoptryes around here to check Opera, if only for this particular feature... the definition of user-friendliness and care for the customer!
On Firefox:
Ctrl++ Increase text size
Ctrl+- Decrease text size
Ctrl+0 Normal text size

For images, try one of the many image-zooming add-ons. I use Image Zoom. In fact, I don't think there's a single feature I want from Opera and Internet Explorer that I haven't been able to replicate on Firefox with the use of add-ons and native features, except for Opera's sheer speed. However, it's my choice to forgo that in exchange for Firefox's unrivalled versatility and customisability.