RuneScape: Full Screen for Non-Members in Three Easy Steps
Many people think Full screen in Runescape is for members (P2P) only. However, there is a way to play full screen for non-members (F2P) as well, although you will have a little ad on the top, but it won’t be much noticeable. (NOTE: The tampering with the ad is by no means illegal, it merely zooms it out).
Now to play full screen, you will have to download the Mozilla Firefox web browser. The link can be found here. Once downloaded and installed, follow these simple steps:
1. Go to www.runescape.com and load the game. Then move you mouse cursor up to where the link is displayed (marked with red in the picture), and highlight it (by clicking it).
2. Now press F11, and the browser will automatically go to full screen mode. The result would be like this:
3. Now we’re in full screen, but there is still that ad over us. Personally, I don’t mind the ad, but if you really want to get rid of it, just click the black portion on either side of the ad, and press CTRL and – buttons. This will zoom the ad out, and it will appear very small, like this:
Now if you have followed the instructions carefully and correctly, you will end up with full screen mode in F2P, and the final outcome would look like this:
HOPE YOU LIKED IT!!!

Nice guide.
Good…but I think you can also do full screen in Internet Explorer by pressing F11 or something.
May be worth checking that out.
hmm…i’ll try…but still…mozilla ftw