Firefox Incompatibility
Not an urgent problem but ...
The following site displays with a grey box in the lower left corner but works fine with Chrome.
All Replies (2)
That is a Google ads_iframe. It goes away if I disable Enhanced Tracking Protection via the shield icon in the location/address bar.
You can check for issues with Enhanced Tracking Protection. Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content.
- click the shield icon for more detail and possibly disable the protection
You can check the Web Console for relevant-looking messages like blocked content.
You can also make it go away by installing uBlock Origin.