Now, when filling out a form in a web page, I can use the tab key to move from one field to the next.  If the field is a checkbox, I press the space bar to check/uncheck it.  If it is a dropdown menu, I type the first letter of the option I want to select.  If there are several with the same first letter, I keep typing the first letter until the option I want is selected. If the filed is a text box, I just type my text and press the tab key to move to the next.  Finally, when I tab to the Submit button, I press enter to submit.

Once you get used to using the tab key to move around web based forms, you'll love it!

More tips for moving around in Firefox:

• Pressing the space bar moves you down a screen at a time.
• The tab key will move to the next link (if there isn't a form) - pressing Enter when a link is selected (dotted outline) is the same as clicking on it.
• Type the slash "/" key will activate the search feature (shown at the bottom left corner of the window) as you type, the next occurance of that sting of text in the page will be highlighted.  If it is a link, click on it to follow.
• After searching for a string of text, press Command+G to move to the next occurance of that string.