ChemDrawJS: ChemdrawJS 20.0 is slow to load on Microsoft Edge and very slow to load with Internet Explorer 11.

ChemDraw JS 20.0 is slow to load on Microsoft Edge and very slow to load with Internet Explorer 11.

To resolve this issue, please try the following:

1. Open Microsoft Edge
2. Click the Settings and More (ellipsis) button in the top-right corner.
3. Select the Settings option.
4. Click on Default browser.
5. Under the “Internet Explorer compatibility” section, select Don't Allow in the “Allow sites to be reloaded in Internet Explorer mode” toggle switch.
6. Click the Restart button.

Internet Explorer 11 reached its end of life on June 15, 2022. For further details, you can check the Internet Explorer 11 desktop app retirement FAQ