Due to Apple's restrictions on what can be used on iOS. There is not even a Firefox version due to restrictions on the browser and javascript engines used.

Also the Thunderbird community has its hands full as is with the current desktop releases.

Taz1936 said

Why no iPad version?

James said

Due to Apple's restrictions on what can be used on iOS. There is not even a Firefox version due to restrictions on the browser and javascript engines used. Also the Thunderbird community has its hands full as is with the current desktop releases.

Mozillaz has announced that an IOS version of Firefox is in the works.

Taz

Providing a full browser on iOS is impossible. Apple locks down iOS such that other companies can only provide skins for the default Safari. This is what Mozilla is perusing with Firefox for iOS.

There is no work on Thunderbird for any mobile platform.