When I use Firefox, I can tab through buttons and other links on web pages and then use the space bar or enter key to "click" the link or button. Is that same feature available in Safari? I think it's something in the preferences in Firefox that lets you do this, but I don't see that option in Safari's prefs.
Safari – How to Use Keyboard to Select and Click Links
keyboardsafari
Related Solutions
Adobe's Safari plugin for their PDF Reader doesn't work in 64 bit mode (and they don't supply a Firefox/Mac plugin at all!).
Try this Adobe kb article to see if setting 32-bit mode for Safari will work for you. I had similar isses a while back, and I had to reinstall Reader (after upgrading to Snow Leopard) after doing this tip.
You are probably searching for the option "Full Keyboard Access".
You can find it under System Preferences > Keyboard > Shortcuts
Best Answer
Option-tab seems to do the trick.