setting up to use the animation

How to install the browser extension to view Organic Chemistry animation

This is a temporary fix for one-off installations. Write to me to be informed when we release the HTML5 version - this is a major undertaking but as of February 2023 we had converted most of our ~200 animations. We are now working on the website which will house it - we will need an army of volunteers to finish this so please drop me, RF a line as doing that might even be fun. 

  • There's an animation below to test if your browser extension is working

In Microsoft Edge  

In Chrome 

In Firefox

  • A Firefox browser add-on link to add-on by Modernkit does a very good job of rendering Flash content. I use it but you can instead try the Ruffle extension as described further down this page.


  • If the ruffle extension isn't in the web store continue follow this text & video below:
  • Click the latest "Chrome / Edge / Safari" link at ruffle. Keep a keen eye to see which folder the zip file goes into. Extract the zip file.
    Copy paste or type in the address bar: chrome://extensions/ (1)
    Turn on Developer mode in the top right corner (2). Click Load unpacked (3) Select the folder you extracted the extension to (4).

In Firefox

Right-click the latest Firefox .xpi download link at Ruffle Click "Save Link As..."
Navigate to about:debugging Click on This Firefox.
Click Load Temporary Add-on... Select the .xpi that you downloaded.

Watch video on Youtube or play below

Did it work?

Refresh this page and click to the right here > click the red double bond >

All set up?

About Organic Chemistry by Roger Frost

  • Provides 24/7 access to learning at home or school. Consistent and complete coverage for A level organic chemistry
  • It works like a web site and can be used on both Mac OS and Windows. Use on IOS and Android devices is also possible.
  • You can buy student + teacher access or just teacher access. See menu above
  • The LICENCE AGREEMENT asks you to limit access to your own staff & students