Show autocomplete suggestions for Developer Toolbar in Firefox?

Question

In the screenshot below (Firefox 39), the Developer Toolbar prompt (the one shown on Shift+F2, not the prompt of the (Web) Console raised with Ctrl-Shift-K, which is also shown above the Developer Toolbar prompt), can be seen to imply to offer autocomplete options:

.. since it suggests --clipboard as soon as -- is typed as [options], and it shows an "Available options" callout. But no matter what I do, I cannot see a list of suggestions for these "Available options" (tried clicking on the callout, pressing Enter, Ctrl-Enter, Shift-Enter).

So how can these "Available options", of the Developer Toolbar, be seen (specifically here for the screenshot command, which is not available from the Web Console)? (Note that in the Web Console, autocomplete suggestions are shown fine in a list, as expected)

Answer 1

How can these "Available options", of the Developer Toolbar, be seen?

• up arrow and down arrow will scroll through the list of suggestions.

• tab will select the current suggestion.

Here is the output from help screenshot which shows the available options:

In your example using screenshot filename.png --, --clipboard is the first matching option:

• If you use up arrow and down arrow you will see the other choices.

• If you press tab you will see:

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How do I use the Developer Toolbar command line?

Using the command line

Like a normal command line, you execute commands by typing them at the prompt and pressing Enter.

As you type, the Developer Toolbar suggests a possible completion to your command.

If there is more than one possible completion, the Up and Down arrow keys cycle through the suggestions. Pressing Tab selects the current suggestion.

Pressing F1 will display all the suggestions in a list, with a summary of what each command will do:

Typing help <command> will give you the help for <command>.

The article continues with a list of the possible commands.

Source Developer Toolbar