Here are some of the things I’ve tried in an attempt to regain the ability to view models in the 3D viewer in the 3DWH in Firefox, along with more info… perhaps someone will spot something that might be helpful –
Disabled ad blockers, tracking cookie blockers and removed custom security and privacy settings in Firefox (which blocked all third party cookies) - this had no affect on getting models to load in the 3D viewer in the 3DWH. I turned off hardware acceleration, that had no bearing.
I restarted Firefox with all add-ons disabled (safemode), but in that state, the option to view a model in the 3D viewer is not even available. Restarted Firefox and manually disabled all extensions and plug-ins despite the fact that I had those extensions and plug-ins before this issue cropped up, restarted the browser and tried again - no luck.
I’m assuming that WebGL is still what enables us to see models in the 3D viewer in the 3DWH, so I went to https://get.webgl.org/, and according to that site, my browser supports WebGL. I also went to https://www.khronos.org/webgl/wiki/Demo_Repository - all the WebGL demos worked.
I don’t know if Java and Flash Player play any part in that 3D viewer, but those and the graphics software are all up-to-date. Firefox released yet another update today, to version 75.0 – I allowed the update. It did not remedy the issue. Is Firefox still one of the three supported browsers?
Around 18 March, there was an “Update for Microsoft Windows (KB4541301).” Despite not having issues with the 3D viewer in Microsoft’s “Edge” browser (neither my default nor preferred browser), but because I had no issue in Firefox before this update, I was going to uninstall that update, but Windows 10 does not allow the option to do so for that particular update. I had not realized it when I started this thread, but Adobe Acrobat Reader DC updated on 19 March. I have no idea if that could have affected anything but I was going to uninstall it just for the heck of it, but as with KB4541301, I did not have the option. So…no help with either of those.
Except for the above mentioned updates, nothing on my computer has changed - prior to this issue there had been no new programs installed, no changes to my browser settings, no new plug-ins or extensions added.
I do not know what else to check or do.