Why are they allowing the Twitter app to have a square background? At least force it into a circle background even with its own square background. I actually like the consistency of having every icon a circle no matter matter. It makes it look much cleaner than how Android icons look (all different shapes and sizes). I suggest they fully enforce the circle backgrounds.

It's not as if it's difficult, it's just border-radius: 24px; or an SVG mask.

"Gallery" and "Settings" aren't really circles either. I don't see any point in enforcing the shape of icons.

Or, if you have a Galaxy Nexus, try out an alpha port here: http://forum.xda-developers.com/showthread.php?t=1805282

Thanks! Been meaning to check this out for a while.

Really nice! I just tried it for a few minutes and that's impressive. Works really well on Mac and FF Nightly.

A few things thought:

- I didn't find how to switch between apps.

- Setting a custom resolution will be a good feature.

- Copy/Paste from desktop to B2G

edit: Ok so to go back to home screen, on a mac use fn+left arrow key of fn+right arrow ke

To switch between apps, you can hold the Home button down (Don't know what that is mapped to in r2d2b2g, and it will 'zoom out' to a WebOS-like list of cards that you can swipe left or right.

Swipe up to Quit the app. Press home, or one of the cards, to return.

Looks like Home is the home button and End is the lock button. (on Mac fn+left = Home and fn+right = End)

Unfortunately it seemed like I couldn't get it to work on Windows.

How long is it supposed to take before you see anything in the simulator?

I had the same issue here (Firefox 16, linux). I downloaded the latest nightly build and it works for me.

OT, but Firefox's extension downloading (at least on Windows 8 Desktop) seems to stop when the pop-up loses focus, meaning you either have to sit there for 8 minutes, or right-click and do "Save Link as...", and then open the downloaded files.

There is a tiny plugin logo to the left of the address bar. Clicking on that will bring the popup back. Easily missed though.

For me it restarted the download...

Great to hear that it works with all your tools!

Follow the development at https://github.com/mozilla/r2d2b2g/ . We are working on the first release, so feedback is more than welcome!

Lovely, I just tried with Selenium and it works. Also, with Eclipse Orion on the other tab and all you need is Firefox to do all development.

Not working for me in Firefox 16.0.2 on Windows 7. There's just a black phone sized Firefox window on my screen.

I don't know why they won't just start making nightly builds. If they setup Jenkins and produced GSM and CDMA Galaxy Nexus build, they would increase testing and feedback significantly.

I believe there are licensing issues with the actual device drivers, they can't be distributed.

Great, so now all my mobile apps can have the same performance, consistent look & feel, and full access to the phone's capabilities as Phonegap / Cordova / Titanium! Clearly this is a step forward for mobile development.