On HTC Hero with Android 2.1 Fennec Alpha does not start.

Fennec Alpha is not compatible with ARMv5 or ARMv6 processors like the one in the HTC Hero, G1, Legend, Magic, Wildfire, Droid Eris, or Samsung Moment.

We have experimental nightly builds with support for these processors. You can download the ARMv5/v6 nightly build at: https://wiki.mozilla.org/Mobile/Platforms/Android

Please note that current Fennec builds are too large for some older or less powerful phones, and the user interface is not yet adapted to run on 320x480-pixel screens.

I am certain Firefox would want their browser compatible with all Android phones, thus is there a fix in the works for these processors that will be in the Beta release? I cannot even get the nightly build to work on my Eris 2.1. It installs, opens for a brief second then is gone. Tried uninstall-reinstall, tried reboot nothing seems to work. Firefox is my favorite Desktop browser and I am very anxious to use it on my phone!

On HTC Desire with Android 2.2 Fennec Alpha start with a black screen and freez.

Try the Firefox Mobile support forum. http://mobile.support.mozilla.com/en-US/kb/