Check Firefox OS version

Question

I'm working on a snippet for check the Firefox OS version used.

Now i'm using the gecko version in the user agent string (is different in every version of Firefox OS) but it's not a professional solution often is simple.

The gist: https://gist.github.com/Mte90/11087561

Any suggestion?

The gist is updated with the better solution for check the Firefox OS version

Answer 1

Not very nice way to do this but you could parse the user agent

 function convertVersionNumber(ver) {
     var hashVersion = {
         '18.0': '1.0.1',
         '18.1': '1.1',
         '26.0': '1.2',
         '28.0': '1.3',
         '30.0': '1.4',
         '32.0': '1.5'
     }
     var rver = ver;
     var sStr = ver.substring(0, 4);
     if (hashVersion[sStr]) {
         rver = hashVersion[sStr];
     }
     return (rver);

 } function getVersion() {
     if (navigator.userAgent.match(/(mobile|tablet)/i)) {
         var ffVersionArray = (navigator.userAgent.match(/Firefox\/([\d]+\.[\w]?\.?[\w]+)/));
         if (ffVersionArray.length === 2) {
             return (convertVersionNumber(ffVersionArray[1]));
         }
     }
     return (null); 
}

Answer 2

This is the only way I know to detect the version of Firefox OS right now. If it's also to see if a feature exists, I would, again, use feature detection instead of version detection.

if (navigator.connection) //Network Information API
if (navigator.battery) // Battery Status API

If these if return true, it's because those features are available on the version the user run your application on.

Answer 3

In /gaia/profile/settings.json can you read the version?

Or use the settings api to read and compare:

deviceinfo.platform_version

Firefox OS Settings List