Hey, thanks for making this really nice tool! I'm having an issue using it with the latest Firefox version though.
Basically, only the unfiltered view of the PDF shows, with none of the color deficiency versions visible. I am able to upload and flick through a PDF's unfiltered color view though.
Here's what I see after uploading a PDF and flicking through the pages:
![Issue with the color blindness images](https://user-images.githubusercontent.com/20070557/149205435-8605902e-999c-4352-9810-10f5057e713c.png)
It works fine with the latest versions of Edge and Chrome for me. However, Firefox 95.0.2 and 96.0 don't render the other panes correctly. Tested on Windows 11 and on Ubuntu 20.04 with a fresh install of Firefox.
Let me know if you need any more details on my setup. It would be great if this could be fixed as I want to recommend this tool to other scientist friends but most of us use Firefox as our main browser. Thanks for your help!