Thanks for the detailed feedback/requests!

> 1. Use F2 to edit selected DOM element. (currently I have to double click it)

Follow https://bugzilla.mozilla.org/show_bug.cgi?id=892275

Now that dom elements are editable, this should follow quickly. I'll ping
bgrins, who implemented the edit-as-html stuff.

> 2. When I add css rule I want to see list of available properties right away
(and later I want to CRTL+Space to show the same list). For example for
text-align: left, right, center, initial, inherit, etc.

Not sure I follow exactly what you are getting at. Would you mind filing a bug
with a little more detail? I don't want to describe the wrong thing and/or miss
what is important to you.

https://bugzilla.mozilla.org/enter_bug.cgi?product=Firefox&c...

> 3. Use orange/yellow/green to draw selected element regions form margin,
border and padding

We are overhauling the highlighter here:
https://bugzilla.mozilla.org/show_bug.cgi?id=663778

Here is a mock up that should be fairly close to how it will look:
https://bugzilla.mozilla.org/attachment.cgi?id=807164

> 4. make the tooltip which appears above selected element with its class and id
optional.

Filed https://bugzilla.mozilla.org/show_bug.cgi?id=934697

> 5. Autocomplete !important keyword in css rules.

Filed https://bugzilla.mozilla.org/show_bug.cgi?id=934695

> 1. Implement one global history for all pages. Use arrow case to browse
console entries.

We do use arrows to browse console history, not sure what you mean there?

What makes you want to share console history between all tabs?

> 2. When I use this $('div') I want to be able to click on result and find that
element in the Inspector tab

Agreed! I think there is a bug filed somewhere but, here is another that will
probably just get duped over and then we will know the original bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=934700

> 1. I want to open some loaded JS file, change something, CTRL+S to save it and
the code should be live. Scratchpad is confusing to me for this scenario.

Eventually we want to have completely live editing where you would only need to
hit "save" when you wanted to commit your changes to the filesystem. You'll be
able to register an event listener, trigger it, then decide it does the wrong
thing, change the function body, and trigger it again and see your
changes. Really excited for this.

Right now, the debugger is read only, and the scratchpad is where you can
prototype really quickly. We are integrating the two together, so hopefully it
will be less confusing soon. Eventually we will have live editing of JS and it
will be incredi-awesome :)

> 2. Unminify/pretify javascript code.

Just shipped to Aurora, although at the moment it is very slow. I used escodegen
as a backend for the pretty printing since it already accepts the ASTs
SpiderMonkey creates, however I didn't expect it to be so slow for our use
cases. I wrote a pretty printer[0] that doesn't rely on full parsing and with
performance in mind, that should get uplifted in the next couple days and pretty
printing won't be so slow anymore.

[0] https://github.com/mozilla/pretty-fast

> Style Editor: 1. Prettier theme for css files.

Perhaps this is alleviated now that we are using Code Mirror on Aurora?

> Others: 1. Implement Continuous Painting Mode

We are planning our performance tools right now, and among the problems we want
to solve is identifying what elements and css rules are degrading performance in
your page. We aren't sure that we want to mimic Chrome's solution, though.

> 2. Implement h shorcut to hide/show DOM elements in the Inspector

You can do this now, at least in Nightly. Not sure how long it has been there,
but I am pretty sure it is in Aurora at least.

> 3. Create Super Lighter theme, which does not have big dark panels
everywhere. I tried both themes, but these big dark panels are still there.I
like white. I work well on white.

Agreed. We have mock ups, but AFAIK everyone is busting out features at the
moment rather than working on the theming. I think Paul Rouget is going to
revisit this pretty soon.

Here are the mock ups:
https://people.mozilla.org/~shorlander/mockups/devTools/ux-r...

Thanks again for the feedback! We value it a ton :)