How to make the Arabic letters bigger WITHOUT magnifying your screen!
Many people have remarked that the Arabic letters here are very small and I agree that it is a horrible pain to keep un-magnifying your screen or losing the edges just to see the characters. However, even in google's search feature, the script is horridly tiny.
One clear way to fix this: use google chrome extensions.
Huruf ( حروف ) is a free Arabic script changer which can not only change the size but the style (font) as well. This is easily found by searching Huruf in the Chrome Web Store.
Wudooh ( وضوح ) is also a free Arabic script changer which I personally prefer to Huroof because it adjusts the size as you adjust - without having to reload - and you can whitelist certain sites if the big Arabic letters adjust the formatting severely. I also like the fonts a bit better. Funnily enough, the word Wudooh means clarity in Arabic.
IF YOU DON'T HAVE CHROME: tough luck; chrome is the superior browser