Hello, I'm seeing silver-coloured shades on my facebook page after logging in with the firefox browser (see images). They fill all access tabs, my contacts' tabs, and also the spaces in the comment sections. They remain there as long as the page is loading up. And disappear whenever the page loading stops. I told the Facebook support about it weeks ago. But they still show on my facebook page, which makes me think that it might not be facebook related since I didn't see them on my same desktop with MS edge. This noshow on latter is what prompted me to think it might be browser related. That is why I'm turning to you guys. So can anyone help with this please ?