To edit or change your table , simply put your mouse over the table and right click your mouse (on the Mac: ctrl-click). This will bring up the context menu that looks like this:

Choose the Insert and Delete commands to add and remove either rows or columns to your table. The Table Properties and Cell Properties commands will let you edit border, background color and more.

In the Firefox browser you can also edit or resize the table by using these small 'handles':

Insert & Delete:

Resize:

Click in a cell in the table to get the handles to appear. You will then see small controls. Clicking on the arrowheads will add a row or column on that side of the cell. Clicking on the circle-X will delete the row or column the cell is in. The resize handle will make the table larger. I suggest you create a table and play around with these handles - they work great and are a very quick way to work with the table. These table handles are a killer feature of the Firefox browser!

(editing table; edit table; resize table; column width; insert column; insert row; delete row; delete column; insert cell; merge cell; table properties)