Hi beahaven,
I would talk with Ken about this. While it’s certainly a good quality topper with great value … it’s suitability for your needs and preferences would depend on the mattress you were putting it on, your own body type and sleeping positions, and on exactly what changes you were hoping to make.
If your mattress has no sags or soft spots and is just too firm … and a 3" 25 ILD Dunlop topper is the most suitable topper for you “in theory”, then it would certainly be a great choice, but there is no way for me to know how it would feel for you without a more detailed conversation and information (and this isn’t the kind of service I have time to provide) so I would definitely suggest a conversation with Ken would be in order.
You can see some subjective topper guidelines that may give you some sense of how suitable it may be in post #2 here and the posts it links to.
I don’t know how privacy fix works but the forum uses fairly standard settings (sometimes I tweak the session times or the cache settings in response to traffic or various other issues) so I would have no idea how to fix any conflict that may arise. That would be outside of my expertise unless someone that was familiar with Joomla (the CMS I use), Kunena (the forums software I use) … both of which are open source … and knew how they may interact with firefox with privacyfix installed was able to duplicate the error and provide some specific suggestions.
Phoenix