[Req] Stop those 'are you sure?' boxes, various sites

[leecovuk]

Hello again,

It might be my imagination, but didn't Prox+Sidki use to suppress those 'are you sure' (javascript?) boxes by automatically answering 'yes' ?
I find now, anyway, that various sites for me keep popping them up when, for example, I hit 'log out' or want to 'empty trash' in the case of a webmail site.
No amount of (somewhat randomly) turning on config filters seems to block them.
Is there a generic way to filter these out and say 'yes' to stop them popping up?

Thanks a lot,
Lee