We've experienced many times a strange issue with Firefox. Basically the app renders correctly, but mouse clicks DOES NOT WORK. The Keyboard seems to be working fine, ... but other interactions are "filtered" somehow.

No errors appear on the console, ... and since the issue is not strange enough the issue is present ONLY on certain computers (not all) with the same version.

We've seen that going to this link could help mitigating the issue but only for a short time,...
https://support.mozilla.org/t5/Proce...lems/ta-p/1032

...but in a few days/weeks the issue comes back again and we're forced to reset again Firefox settings.

The behavior can be reproduced on https://examples3.ext.net too!

Is there any known issue with Firefox like this?
Thank you for a feedback,
Cheers