This API is available on Firefox OS for internal applications only.


The DOM MozSmsSegmentInfo interface provides information about how a string of text will be automatically split into segments. Each segment represents a single SMS of a multi-part SMS message.

The MozSmsSegmentInfo interface cannot be instantiated directly; use the MozMobileMessageManager.getSegmentInfoForText() method to get such an object.


MozSmsSegmentInfo.segments Read only
The number of total segments for the input string.
MozSmsSegmentInfo.charsPerSegment Read only
The number of characters available per segment.
MozSmsSegmentInfo.charsAvailableInLastSegment Read only
The maximum number of available characters in the last segment.


This is a non standard implementation, but it is discussed at W3C as part of the System Application Working Group.

Specification Status Comment
Messaging API Editor's Draft Editor Draft (WIP).

Browser compatibility

For obvious reasons, support is primarily expected on mobile browsers.

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support No support No support No support No support
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support 12.0 (12.0) Moz No support No support No support

See also

Document Tags and Contributors

 Contributors to this page: chrisdavidmills, teoli, MHasan, Jeremie, kscarfone
 Last updated by: chrisdavidmills,