Not really an issue at the moment, since have fixed it here, and,
yes, I didn't follow the recent threads on issues with making use
of waterfox/firefox, but, just did a completely clean
reinstallation of my windows 10 64 bit machine from scratch, and,
while installing software packages, and reconfiguring combinations
of NVDA and add-ons, etc., I found out that the moment I installed
global commands extension, both waterfox and firefox no longer
seemed to allow me to interact with the web-page contents, besides
tabbing through all elements.
Chrome-based browsers, like chrome itself and brave still seemed
to work fine, though.
When I then went into the global commands extension settings,
and, turned off it's extended virtual buffer extension, suddenly
both those browsers, running versions of the same engine under the
hood started working fine again.
In other words, just posting this here in case it's affecting
someone else, and, in case this form of a solution wasn't figured
out in the prior thread - sorry if duplicate info.
Stay well
Jacob Kruger
Blind Biker
Skype: BlindZA
"...resistance is futile...but, acceptance is versatile..."