Website format on PCs

Tried suggested approach (i.e. clearing cache, ad blockers,etc) and all browser versions in use were already (and still are) up to date. Issue persists. Please review attached screenshot of issue as presented.

@Col_Needham​ Please see above updated entry and respond as appropriate/needed.

I've managed to resolve the issue in regard to using Firefox as my default browser. I'd tried various setting (e.g. involving private browsing options) and clearing cache/history etc... bit nothing seemed to resolve this issue presented. As an alternative approach I firstly uninstalled Firefox and then ran (Norton 360) security checks [Note. Nothing was detected.). I then downloaded, and installed (same version of), Firefox again. The issue encountered/reported is no longer present.

I think (best guess based on my career as an Test Team Leader & Manager) the issue was due to some data [corruption] within register entries was involved.