

https://addons.mozilla.org/en-US/firefox/addon/redirect-bypasser-webextension/ in desktop Firefox seems to work for your link. For mobile there might be apps that you share the link to and they dissect it, but a very quick search didn’t turn up anything.
Well, “fill your fridge/freezer so there’s less cold air inside that can be replaced by warm air when opening it, then it does need less energy to cool down again after opening” is true, but the reasoning… No isolation is perfect (and certainly not that of affordable household fridges) so there’ll always be warmth getting in that has to be moved out again. Cooling only doesn’t require energy if surrounded by equal coolness.