What do you mean "enter any data" never seen this before? I clicked amazon uk and search without issue. So what does the screenshot show? Minus/Blacked out private info.

Using Windows 10x64 Pro 1803 and FF65.0.2x64.

Just what I said. Open Firefox, go to https//amazon.co.uk (redirect from www.amazon.co.uk), move mouse pointer to any object on the page and it cannot be highlighted - so you cannot enter any characters, not even login. Browser is now locked. Cannot use ‘back’, cannot enter new www.address, but can close the browser. Same is true going to amazon.com. No problems with every other website I’ve tried. Used to work fine.

I can click on the quick look and have no problem seeing it.