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    Firefox OS 1.4 for developers

    Firefox OS 1.4 is at a pre-release stage right now. Its Gecko component is based on Firefox 30 (see Firefox 30 release notes for developers.) This page details the developer features newly implemented in Firefox OS 1.4.


    Gecko general:


    SpiderMonkey general:


    Firefox OS specific:

    Gecko general:


    Gecko general:


    • The precompile manifest field is now supported, which specifies that asm.js code contained within the app should be compiled at install time, install of during first run.

    See also

    Older versions


    Document Tags and Contributors

    Contributors to this page: NickDesaulniers, teoli, ccarruitero, fscholz, chrisdavidmills
    Last updated by: ccarruitero,
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