Speedengine DeferJS

Speedengine DeferJS



Magento Platform
Open Source (CE)
2.0, 2.1, 2.2

Tech Specifications

Current Version:
Stable Build
06 July, 2018
Extensions, Site Optimization
Supported Browsers:
Chrome Linux: 42, 43, 44 Mac: 39, 44 Windows: 39, 40, 42, 43, 44 Firefox Linux: 31, 38, 39, 40, 41 Mac: 31, 38, 39, 40, 41 Windows: 31, 38, 39, 40, 41 Opera Linux: 7, 7.1, 8, 9 Mac: 7, 7.1, 8, 9 Windows: 7, 7.1, 8, 9 Safari Linux: 7, 7.1, 8, 9 Mac: 7, 7.1, 8, 9 Windows: 7, 7.1, 8, 9 IE Windows: 10, 11, 8, 9, Edge
License Type:
GNU General Public License 3.0 (GPL-3.0)


The SpeedengineDeferJS Extension by Bitware improves Magento store performance by automatically deferring your JavaScript loading. 

Other Extensions by Bitware Technologies


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It helps you optimize your Magento website and Increases the Google PageSpeed score. The extension moves Javascript to the bottom of the page and solves the render-blocking Javascript problem. This will reduce loading time and engage more customers to enhance sales amount. You will need this extension if you want to optimize the frontend speed and improve the user experience of your Magento store.

Deferring JavaScript is listed as one of the most impactful performance enhancements you can make among many other website optimization tips. Hence, this Speedengine DeferJS extension can both help store owners get more benefits about ranking and bring customers the best shopping experience without waiting so long for content as before.

List of Features:

  • Designed to preserve HTML validation: HTML CSS will not break after installing The SpeedengineDeferJS extension
  • Exclude Home page to get deferred: You have the option to enable or disable homepage javascript deferring.
  • Moves Javascript to the bottom
  • Simple backend interface
  • Provide easy configuration



Release Notes

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  • Compatible with Open Source (CE) : 2.0 2.1 2.2
  • Stability: Stable Build
  • Description:

    Bitware SpeedengineDeferJS
    This 1.0.0. release of Bitware SpeedengineDeferJS adds the following features to your store
    It wiil decrease the loading speed of page
    Improve store performance
    Move all JavaScript at the bottm of page
    Can exclude home page from deferring
    Simple Configuration


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The best place to start if you need help with a specific extension is to contact the developer. All Magento developers have both a contact email and a support email listed.

Q & A

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