In the last installment, I talked about the simplest form of "bookmarklets": bookmarks defined by Keywords and user-defined strings.
For instance, try typing this into Firefox's URL bar:
The browser keeps the current page loaded. But in addition, a dialog pops up asking you for a color. Choose a color and click OK -- and the text of the current page changes (Figure 2). To turn it black again, use this link or click Reload.