I have been having a few similar issues with Firefox over the last 3 weeks or so. Links in yahoo news are opening into white lightbox with no content and now cannot sign into my gmail account. The family have a few different gmail accounts and when we click on to choose one for signing in nothing happens. All works well in other browser ie chrome, edge & opera. I'm using windows 10 and Firefox 53.0.2 32 bit. Any help would be much appreciated.
Thanks in advance